№ XVII
The twelve plates
The party named in the statute is rarely the party that pays. This volume is about the incidence of a tax — the gap between who is charged and who bears — and the quiet machinery, hidden in every price, by which a burden once imposed slides off the shoulders the law named and onto whoever can least escape it. The wedge a tax drives between what a buyer pays and a seller keeps, the elasticity that splits it, and the contest, beneath the schedule of rates, over who has somewhere to flee.
the law names the party who shall hand a tax to the state, and we read that name as the answer to who pays — but is the burden not driven, through prices, onto whoever can least escape it, so that who truly bears a tax is settled by a contest the statute never mentions?
The law that lays a tax writes a name into its text — the seller shall remit, the employer shall withhold, the corporation shall pay — and the plain reader takes that name for the answer to the one question that finally matters: who pays it. It is a natural reading, and almost always wrong. The party a tax is levied upon is rarely the party that ends the poorer for it, for a burden, once imposed, does not sit where the law sets it down. It moves. It works through the prices at which things are bought and sold, shifting from the shoulders the statute named onto others it never mentioned, until it rests somewhere no drafter chose and no schedule records. This volume is about that movement — the incidence of a tax, the difference between who is charged and who bears — and about the quiet machinery, hidden in every price, by which the bill for the public business is passed from hand to hand and presented to someone who never signed for it.
Economists mark the difference with two terms. Statutory incidence is a matter of law: it names who must hand the money to the state, and is written plainly in the code. Economic incidence is a matter of consequence: it names whose command over goods is actually reduced, and is written nowhere, for it must be discovered. The two coincide only by accident. A tax laid on a manufacturer is built into his prices, and the shopper, who never remits a cent, pays it at the till; a tax on the wage may be borne by the worker in lower take-home, or shifted to the employer, or passed to the customer in a dearer product, as forces the law does not touch decide. The intuition is old: the Physiocrats held that every tax, however first laid, was shifted and shifted again until it rested on the land, the one thing that could pass it to no one — wrong in the detail, right in the insight that a tax goes where it is driven, not where it is set.
The clearest way to see the movement is to picture the tax as a wedge. Before it, a single price joins buyer and seller: the buyer pays what the seller receives. The tax drives a wedge between them, so that now there are two — a higher price the buyer pays, a lower one the seller keeps — the difference, the wedge’s thickness, flowing to the state. The question of incidence is where the wedge opens: how much above, by the buyer in a higher price, and how much below, by the seller in a thinner return. And the decisive fact, the one that overturns the naïve reading of the statute, is that the division of the wedge has nothing to do with which side the law tells to pay. A tax collected from the seller and the identical tax collected from the buyer split exactly alike; the burden settles in the same place either way, indifferent to who remits. What governs the split is something no law can legislate.
What governs it is the capacity of each side to walk away. The burden of a tax falls on whichever party is less able to escape it — to substitute something else, to do without, to take its custom or capital elsewhere. The side with alternatives shifts the burden onto the side without them, which must stay and bear it. Tax a thing buyers cannot easily forgo — bread, fuel, medicine — and they, with nowhere to turn, pay nearly the whole of it in a higher price; tax a thing they can readily drop, and the sellers, who would rather cut their margin than lose the sale, absorb most of it. The economist's name for this capacity to flee is elasticity — the responsiveness of the quantity one will trade to a change in price — and the rule of incidence is exact: the more inelastic side, the one that cannot get away, bears the greater share, and the elastic side escapes. The burden seeks out the captive.
And here the tax shows what it has in common with every other figure this work has anatomized. A price is a verdict on a hidden contest, mistaken for a fact of nature — and the price a tax brings into being, the altered price that ferries the burden to its resting place, is a verdict of precisely that kind. It looks like mere arithmetic — the old price plus the rate — but the look deceives, for how much of the tax surfaces in the buyer’s price, and how much sinks into the seller’s return, is no arithmetical necessity but the settled outcome of a contest between them, a silent trial of strength over which side can do without the other. The statute names a party to remit; it names no party to bear. That second naming, the one that counts, is done not in the chamber where the rate is set but in the market where the price is struck, and the price announces the verdict without ever disclosing the contest behind it.
Take the gravest instance, the tax upon capital. The law charges the corporation, and the public imagines its owners reduced by exactly the sum. But capital is the most mobile of things — it crosses borders at the touch of a key, withdraws from where it is taxed heavily and gathers where it is taxed light — while labor stays, bound to where the worker has built a life. When the taxed factor can flee and the untaxed cannot, the burden migrates: a tax laid on capital comes to rest, in no small part, on wages, the immobile bearing what the mobile escapes. A price is a verdict on a hidden contest, mistaken for a fact of nature; and the incidence of the great taxes — falling between capital and labor, between the party that can move and the party that cannot — is the verdict of the contest between them, handed down in the guise of a fact of fiscal arithmetic. To learn who truly pays a tax, one asks not whose name the law has written but who, when the wedge is driven home, has somewhere else to go.
For elasticity, on inspection, is not a brute datum of nature but another name for power and for options. To be elastic is to have somewhere to turn — the capital that can cross a frontier, the firm that can shift a plant abroad, the household that can give up a luxury; to be inelastic is to be cornered — the worker tied to a town, the family that must heat its home and feed its children, the owner of land that can be taxed but never moved. The distribution of a tax's burden is therefore the distribution of escape, and the distribution of escape is, at bottom, the distribution of power. The schedule of rates a legislature argues over is only the visible face of taxation; its hidden face, decided in the market once the law has passed, is the sorting of the taxed into those who can flee the burden and those who must shoulder it. And that sorting, far more than the rate on the page, decides what a tax accomplishes — whom it spares, whom it grinds, and whose verdict the final price records.
The twelve plates follow the burden from the wedge that splits it to the compact that would justify it. They set out the wedge of incidence and the escape elasticity affords; the excess burden a tax destroys beyond the revenue it raises, and the inverse rule that taxes most heavily the things that flee least; the ladder of progression that should climb with the capacity to bear it, and the toil of labor the income tax discourages as it taxes; the tariff the home consumer quietly pays, and the ground whose tax cannot be shifted, since land has nowhere to flee; the corrective levy that taxes a harm to mend it, and the leak through which the taxed avoid and evade; the base on which the edifice rests — income, consumption, or wealth — and, at the last, the compact: what a society’s members owe to its keeping, who must consent before they pay, and whether a tax is tribute extracted by power or the price of a civilized common life. Other volumes have prepared the ground: the volume on the surplus traced the deadweight loss a tax inflicts on the gains from trade; that on the externality, the corrective tax that turns a spillover to account; on the stock, the levy that would reach wealth the income tax cannot; on the rent, the unearned increment a land tax would capture; on the rule, the sovereign power without which no tax could be laid. The tax takes its place among the institutions as the one that presents the bill — and conceals, within the price, the name of who in truth pays it. The argument remains open.