A single worker's refusal can be a small interruption to a large employer. The same refusal, made together by the people whose work keeps the enterprise moving, can become a condition on which the enterprise must proceed. The alteration lies in the capacity to withhold something the other side needs. It is power answering power, and its first achievement may be to make a bargain possible where the weaker party previously received a set of terms. The achievement raises a difficulty at once. An organization strong enough to resist can also be strong enough to exclude. The counterweight must therefore be judged by what it checks, what it secures and what remains outside its protection.
Galbraith gave this opposing force a place that the familiar account reserved for competition. Competition ordinarily disciplines a seller through other sellers: a buyer can take the order elsewhere. Countervailing power arises across the transaction, when buyers organize or grow strong enough to bargain against an already powerful seller. The union facing an employer and the large retailer facing a manufacturer are his characteristic cases. The distinction concerns the direction of the check. More sellers may improve the buyer's alternatives; a stronger buyer may improve its ability to refuse the terms offered by the sellers that exist. Either can matter. They need not produce the same result, and the presence of one does not make the other unnecessary.
The reason for organizing is strongest where there is something substantial to recover. A dispersed set of buyers may each tolerate terms that an organized buyer would contest, because the cost of negotiation is large for each small purchase and the gain from organizing is shared. A prosperous seller's margin makes resistance valuable. Yet the existence of a prize does not conjure an organization into being. Members must agree, contribute and remain together when a separate concession is offered. Those who would benefit may have very different capacities to wait. Galbraith's account identifies a force tending to summon an opposition; it does not establish that every dependency will discover its own cure. The people least able to endure an interruption can also be the people least able to make a threat effective.
The first consequence of a stronger bargaining position can be a redistribution of an unchanged gain. Imagine a single transaction worth a hundred to the buyer and costing the seller forty to supply. At a price of ninety, the buyer receives a gain of ten and the seller fifty. At seventy, each receives thirty. The available gain remains sixty. If organization achieves the second price without changing quality, quantity or real costs, it has moved twenty from one side to the other. That transfer can be an important correction to the distribution of power. It should not be described as twenty newly produced. Nor should it be dismissed because it is a transfer: the question of who receives a gain is precisely one of the questions for which the weaker side organized.
A union makes the distinction between a member's bargaining position and the condition of a whole market particularly visible. When an employer can obtain labor on terms shaped by workers' weak alternatives, collective refusal can improve those terms. Whether employment rises or falls depends on the employer's demand, the bargaining arrangement and the resulting wage and employment choices. A higher wage is not a theorem about the number hired. Nor does a gain for the members prove an equal gain for people seeking admission to the occupation. The original labor case therefore carries two inquiries into this plate: whether workers can answer the employer as a group, and whether the group's rules enlarge or narrow the opportunities of people who remain outside it.
The large buyer poses the additional question of whom its strength benefits. A retailer may win a lower wholesale price from a manufacturer and pass it on, retain it or use it to improve the service. The existence of a discount does not identify which. Suppose a product costs the manufacturer four, is sold to the retailer for eight and requires two of retail handling. If competition keeps the retail price at wholesale cost plus handling, the public pays ten. A reduction in the wholesale price to six brings that competitive retail price to eight. With the unit and all real costs unchanged, two has moved from the manufacturer's margin to the customer's saving. The improvement for the customer depends on the condition that carries the concession through.
Remove that condition and the same wholesale bargain can stop at the retailer. If the retailer can keep charging ten after its purchase price falls to six, it receives the two that the customer received in the first example. Production and handling still cost six in total; the difference is the destination of the margin. Galbraith explicitly acknowledged the criticism that competition among retailers helps transmit the gains of countervailing power. The admission makes the theory more useful. Opposed power need not replace competition in order to matter. It can work with competition, obtaining a concession at one stage that rivalry transmits at another. The proof of benefit must follow the gain along that route rather than stop at the first powerful buyer's success.
A buyer's power can also harm the process from which a bargain is supposed to emerge. A lower purchase price obtained through an alternative source is different from a lower purchase price obtained by eliminating the supplier's alternatives. The latter can discourage supply or investment even if the buyer calls the result a saving. This is why an opposed power cannot be certified as beneficial merely because it faces a seller with power. Each side may exercise a restraint, and the effects need to be examined separately. The current federal merger guidelines expressly apply that inquiry to mergers of buyers, including employers. They ask what happens to competition for the input, not simply whether a large purchaser will be able to negotiate harder.
The balance becomes especially unstable when the two organized sides can agree at someone else's expense. A producer and its organized counterpart may find it easier to divide a protected return than to expose it to new entry. They can then have a common interest in keeping outsiders from the bargain. In his reply to critics, Galbraith accepted that countervailing power could work imperfectly and that conditions of inflation could allow organized groups to combine against the public rather than check one another. The warning reaches beyond that setting. A balance between two organizations does not by itself represent the people who must pay their joint bill. The public interest cannot be inferred from the fact that both powerful negotiators signed.
The question of representation thus returns inside the counterweight. Who can become a member? Who chooses the negotiator? Whose loss can be exchanged for another member's gain? A large buying organization may contain customers with conflicting needs; a union may contain workers with different prospects; a public body may answer to constituencies with unequal resources. These are not reasons to leave the weaker party unorganized. They are reasons to distinguish the capacity to resist from the accountability of the resistance. A credible right to leave, a means of contesting a decision and a rule about who may enter change what the organization can demand in the names of the people it represents. Strength without those questions merely moves the inquiry one level inward.
Galbraith's answer consequently did not require the abandonment of antitrust. An opposed power could check a powerful business in circumstances where atomized buyers could not, while competition and public intervention remained necessary where the check failed. The argument is more demanding than the promise that power automatically breeds its opposite. It requires an account of organization, transmission and exclusion in each setting. A better bargain for a union's members, a lower price secured by a chain and an independent regulator's refusal are different achievements. Each may restrain a dependency; each must still be judged by the market it leaves behind and the people whose alternatives it changes.
The strength to answer power is also a strength that must answer to someone.
The counterweight earns its place when it gives a refusal practical force and makes the terms of dependence contestable. It loses that justification when its own privileges become the reason others cannot refuse. Competition, organized bargaining and public authority can therefore support one another without becoming substitutes in every case. The next difficulty is the public authority itself: the institution asked to hold the balance may become another place at which the powerful purchase advantage. Then the check needs an account not only of its powers, but of the interests that shape their use. The argument remains open.