The Remedy

The last plate ended with a map and a promise: that the surplus on a fixed scarcity can be captured without disturbing the price that rations it or the reward that calls forth supply, because the surplus is separable from the work the price does. This plate keeps the promise. It names the remedy the whole volume has been moving toward, which is also the oldest and cleanest idea in the economics of rent: tax the rent of land. Take the surplus that a fixed scarcity yields — the unearned rent that accrues to whoever holds the deed — and collect it for the public that created it, by a tax levied on the value of land itself, apart from anything built upon it. Because land is fixed, the tax falls on the owner and cannot be passed on; because the rent is unearned, taking it wrongs no one; and because the supply of land does not budge, the tax distorts nothing. This is the land-value tax, and in its most ambitious form — Henry George's single tax, which would fund the whole of government from land rent and abolish every other levy — it was once the most discussed economic idea in the English-speaking world.¹

The idea is far older than George, and runs through the whole classical tradition. The Physiocrats of eighteenth-century France proposed an impôt unique, a single tax on the rent of land, holding it the only levy that took from a true surplus. Adam Smith observed that ground-rents and the rent of land are a revenue the owner often enjoys without any care of his own, and so the species of revenue best able to bear a peculiar tax. Ricardo's theory of rent supplied the proof: because the rent of land is a surplus determined by the price of its produce, and not a cost that enters into it, a tax on rent falls on the landlord alone and leaves prices and output untouched. Mill proposed to capture the unearned increment — the rise in land values that social progress confers on owners who did nothing to earn it. And George gathered all of this into a single, blazing argument and a single proposed tax.²

What unites these thinkers across two and a half centuries is the recognition of a property so unusual it can seem too good to be true: that a tax on the rent of land is the one tax that costs nothing to levy. Every other tax discourages the very thing it touches — a tax on wages discourages work, a tax on sales discourages trade, a tax on capital discourages investment — and the discouragement is a deadweight loss, trades that would have happened and value that would have been made, now lost, on top of the revenue raised.

The land-value tax alone carries no such loss, because the thing it taxes cannot be discouraged. Land does not work less when it is taxed, or hide, or flee abroad, or decline to be born; it sits exactly where it always sat, in exactly the quantity, however heavily its rent is taxed. The tax changes nothing real: not the supply of land, which is fixed, nor the price a user pays to occupy it, which the scarcity sets, nor the use to which it is put. It simply moves the rent from the owner's pocket to the public's. A tax with no deadweight loss is a thing economists scarcely believed possible, and here it is — which is why Milton Friedman, no friend of taxation, called the land-value tax the least bad tax there is.³

But the land-value tax does more than avoid harm; it does positive good, improving the use of land in a way no other tax does. Consider what it does to the speculator. Under the system we have, where the rising value of land accrues to whoever owns it, the surest path to a fortune is often to buy land, do nothing with it, and wait — to hold a vacant lot or a derelict building in a rising city and let the unearned increment accumulate, contributing nothing while the community's growth does the work. The land-value tax destroys this strategy at a stroke. Because the tax falls on the value of the land whether or not the owner uses it, holding land idle becomes expensive: the owner must pay the tax every year regardless, and so is driven either to put the land to its best use — to earn the rent the tax demands — or to sell it to someone who will. The tax thus pushes land out of idle hands and into productive use, exactly reversing the incentive to hoard.⁴

It improves matters from the other direction too. The ordinary property tax, which falls on buildings as well as land, punishes improvement: build a better building and your tax rises, so the tax discourages the very construction a city needs. The land-value tax, falling on the land alone, leaves improvement untaxed — build all you like on your plot and your tax does not change, since it depends only on the value of the location. So the land-value tax encourages development where the property tax discourages it. Here is the rare policy that raises revenue, improves the allocation of resources, and could replace taxes that do harm — a double dividend, paid in efficiency and equity at once.

The justice of the tax rests on a fact the volume established long ago: that the rent of land is, very largely, created by the community and not by the owner. A plot in the heart of a city is valuable not because its owner improved it — he may have done nothing at all — but because a city grew up around it: because roads and railways were built, because neighbours came and trade flourished, because the public, collectively and at its own expense, made the place worth being. The increment is unearned by the owner and earned, if by anyone, by the community whose presence and investment produced it. To let the owner keep it is to let him collect a value others made; to tax it is to return that value to its makers.⁵

Economists have given this intuition a precise and startling form, in what is now called the Henry George theorem. When a government spends on a public good, the value of that good shows up in the rents of the land it serves, for people will pay more to be near it. Joseph Stiglitz proved that, under the right conditions, the rise in aggregate land rent a public good produces is at least as large as the good's cost — and that, in a city of the right size, the total land rent equals exactly the total spent on public goods.⁶ The implication is extraordinary: land rent is not merely a fair thing to tax but the natural source of public revenue, because public spending creates land rent in the first place, and a land-value tax simply recaptures, to pay for the public good, the very value that the public good conferred.

Could it pay for everything, as George dreamed? Probably not. George wrote in an agrarian age, when land was the dominant form of wealth and its rent a commanding share of all income; a modern state spends a third or more of national income, and the rent of land, though large, would strain to cover the whole of it. The pure single tax — land rent as the sole support of government, every other tax abolished — is likely beyond reach, and the honest case for the land-value tax is not that it could fund the entire state alone but that it could fund a great deal of it, and replace, dollar for dollar, the more harmful taxes that distort the economy.⁷

And the share of income that land commands is larger, and growing faster, than the agrarian framing suggests. When Thomas Piketty documented the rising share of income flowing to capital across the rich economies, it was widely read as the return of the industrialist and the financier. But Matthew Rognlie, examining the same data, found something different: that the entire long-run rise in capital's share, across every major advanced economy, comes from housing — and housing value is, in great part, the value of land. The rentier of our age is not chiefly the venture capitalist but the landowner; the scarce, unproduced factor whose rent is swelling is the same one Ricardo and George wrote of, returned in modern dress. Land rent is not a relic shrinking into irrelevance but a large and rising share of what the economy produces, which makes the case for capturing it stronger now than when George made it, not weaker.⁸

If the idea is so sound, why is it so little used? The obstacles are real, and three of them deserve a fair hearing.

The first is assessment. The land-value tax falls on the value of land alone, apart from the buildings upon it — but land and buildings are bought and sold together, and prising apart the value of the one from the other is a genuine technical difficulty, requiring judgement and inviting dispute. It is not insurmountable; assessors infer land value from the sale of vacant lots, from the residual after a building's cost is subtracted, from the patterns of a whole market, and many jurisdictions assess land separately as a matter of course. But it is a real cost and a real complication, and the source of many a practical objection.⁹

The second difficulty is the gravest, and the volume has met it before under another name. It is the transition. The rent of land has long since been capitalised into the price of land — folded into what every current owner paid to acquire their plot. The people who hold land today, for the most part, did not capture the unearned increment; they bought the land at a price that already reflected it, often with borrowed money, often as the chief asset of their lives. To impose a full land-value tax now would be to destroy the value of what they bought — to collapse the price of land toward nothing, wiping out the savings of everyone whose wealth is in land or a home, not because they did wrong but because they bought in good faith into a system the tax would dismantle. This is the transitional gains trap exactly, the same trap that protects the taxi medallion and the occupational licence: a rent, once capitalised and paid for, defends itself behind the sympathetic figure of the owner who paid full price for it. George met this objection with a hard answer — that the original injustice of private landholding justified the loss, and that to compensate owners would be to ratify the theft — while Mill had offered a gentler one, proposing to tax only the future increment and leave existing values alone. The gentler path expropriates no one but captures far less; the harder path captures the rent but at a human cost the politics will not bear. Between them lies the whole difficulty of getting from here to there.¹⁰

The third difficulty is plainly political, and the record shows it. The land-value tax is not merely a theorist's dream; it has been tried, and where tried it has largely worked. Estonia funds its local governments substantially from a tax on land. Singapore captures a large share of the land-value uplift its own planning decisions create. Taiwan, Denmark, and others tax land value directly; more than thirty countries use some form of it; and a string of Pennsylvania cities, Pittsburgh among them for most of the twentieth century, taxed land more heavily than buildings and credited the policy with reviving their downtowns. Yet the adoptions remain partial and the repeals frequent — Pittsburgh abandoned its split-rate tax in 2001, not because it failed but because a botched reassessment shifted tax burdens and provoked a backlash. The pattern is telling: the tax works where it is tried, and is tried only rarely and abandoned easily, because the people who own the most land are many, organised, and opposed, and because the difficulties of assessment and transition give their opposition a respectable cover.¹¹

What, then, becomes of the remedy? Not, perhaps, the single tax in its pure and total form, imposed overnight to fund the whole state and abolish all others — that is barred by the transition and the arithmetic alike. But the remedy is better understood not as a switch to be thrown than as a direction to be travelled. A state can shift the weight of its taxes, gradually and by degrees, off the things that should be encouraged — work, building, investment — and onto the rent of land, which can bear the weight without flinching. It can capture the future increment, as Mill proposed, taking the unearned rises in land value as they accrue without disturbing what owners already hold. It can tax land more and buildings less, in the split-rate manner, easing toward the ideal without the shock of arriving all at once. Each step captures some of the unearned surplus, improves the use of land, and lightens some more harmful tax — and the transition, spread over time, loses its cruelty. The remedy is a road, and one can travel some distance down it without going to the end.¹²

This is the destination the volume has been approaching since its first page. It asked, of every price, what hidden contest it was a verdict in; and of rent it found, too often, a verdict in favour of mere control — the surplus that scarcity hands to whoever holds the bottleneck, earned by no contribution and defended by no merit. The efficiency defence showed that this surplus, on a fixed scarcity, is separable from the work the price does; and the remedy now shows how to take it — to capture the unearned rent while leaving the signal to ration and the reward to induce. The contest between contribution and control is, in principle, resolved: let the price stand, for it does necessary work, and let the public take the surplus, where the surplus is unearned. What remains is to see this argument at work in the great rent questions of the present age — in the price of housing and the walls of the zoning code, in the new enclosures of patent and platform and data, and in the figure of the rentier himself, whose return the last plates of this volume will examine. The remedy is known. Its application is the unfinished business of the age.¹³