Public Choice Theory Studies Politicians as People, Not as Angels

Every high school civics class contains a charming fiction. A citizen sees a problem, a legislator hears the call, an agency applies expertise, and the public good emerges, like a bus arriving on time. Nobody in the room believes this about their own workplace. Nobody believes it about their own family. Yet we are expected to believe it about the one institution that spends trillions of dollars a year, runs on rules nobody has read, and employs people who face no competitor and cannot go out of business.

Public choice theory is the discipline that asks a rude question about that fiction. What if the people in government are just people? Not villains, not saints, but human beings with careers, budgets, friends and re-election campaigns, responding to the incentives in front of them? The answer turns out to explain a great deal about Washington, and, as we will see, the right conclusion is a conservative one: we do not need better rulers, we need better rules.

Define the term

Public choice is the application of the tools of economics to politics. It studies how voters, politicians, bureaucrats and interest groups behave when each pursues his own goals within a set of rules. Its starting assumption is simple. The person who acts in the market and the person who acts in government are the same person. If a man responds to prices at the grocery store, he responds to incentives at the Capitol.

The point is not that officials are cynical. Many are public-spirited. The point is that good intentions do not change the incentives, and a system that depends on virtue alone will eventually run out of it.

Make the contrast with the older view concrete. The textbook picture treats government as a benevolent planner that corrects market failures. Public choice replies that if markets can fail because people pursue their own interests, then governments can fail for the same reason. Compare like with like: imperfect markets against imperfect governments, not imperfect markets against an ideal state.

The man and the book

James M. Buchanan was born in 1919 in Tennessee, taught at the University of Virginia and later at George Mason University, and won the Nobel Memorial Prize in Economic Sciences in 1986. The Nobel committee cited his development of the contractual and constitutional bases for the theory of economic and political decision-making.

His most famous book is The Calculus of Consent (1962), written with Gordon Tullock. Its subtitle, Logical Foundations of Constitutional Democracy, tells you the project. The authors asked what rules a group of free individuals would agree to for making collective decisions, and how those rules should be judged. They did not start with a vision of the good. They started with individuals, their interests and the problem of living together.

Other contributors shaped the field. Anthony Downs published An Economic Theory of Democracy in 1957, and Mancur Olson published The Logic of Collective Action in 1965. We will draw on them, but the through line is Buchanan's: politics without romance.

Four core ideas

1. Concentrated benefits, dispersed costs

This is the engine of most bad policy, so take it slowly and look at the arithmetic.

Suppose, as a hypothetical, that Congress considers a subsidy that gives $100 million to 1,000 firms in one industry. Each firm receives $100,000. The cost is spread across 100 million taxpayers. Each pays $1.

Who shows up? Each firm has $100,000 to gain, which is worth hiring a lobbyist, writing a check to a campaign and sending an executive to testify. Each taxpayer has $1 to lose, which is not worth a postage stamp, much less a Saturday.

So the subsidy passes. Nobody was fooled, and nobody was bribed. The incentives simply pointed one way. Repeat that across thousands of programs and you get a government that is very good at helping organized groups and slow to notice the family that pays for all of them. The sugar program, examined in the sugar program makes every family pay more so a few growers earn more, is a textbook case.

2. Rational ignorance

Why do voters not rise up? Because, as Downs pointed out, it is rational not to be informed. One vote almost never decides an election. The time it would take to read a budget, a bill or a regulation is large, and the chance that your knowledge will change the outcome is tiny. A sensible person spends his attention where it pays, on his job, his family and his mortgage, and leaves the details of Section 4(b)(7) to others.

That is not a character flaw in voters. It is the correct decision, given the incentives. The consequence is that the people who do pay attention are those with a stake: the lobbyists, trade associations and agencies themselves. The system hands them the field.

Think about how little of the Federal Register you have read. In 2025 it published 2,441 final rules, and in 2024, 3,248. Rational ignorance is why that does not trouble most people until a rule lands on them. For a look at how to take the first step, Your Questions About the Code of Federal Regulations, Answered Plainly is a good place to start.

3. Logrolling

Logrolling is vote trading: you support my project, I will support yours. It is the oldest custom in any legislature. A representative from one state wants a dam, another wants a highway, a third a research center. None would pass alone. Together they pass, and the voters in every state pay for the others' projects.

Is that corrupt? Not necessarily; it can reflect real intensity of preference. The trouble is that it systematically expands spending, because the cost of each project is spread across everyone while each member brings home a visible gift. The earmark fight, covered in earmarks came back, and the conservative argument over pork never ended, is logrolling in its purest form, and it is why a spending bill can grow far above what any single member would defend on the merits.

4. Rent-seeking

An economic rent is a payment above what it takes to bring a good or service into being. Rent-seeking is the pursuit of such payments through political means, such as a license, a quota, a tariff, a subsidy or a regulation, instead of by serving customers better.

Gordon Tullock explored the idea in the 1960s, and the label was popularized by economist Anne Krueger in the 1970s. Its sharpest insight is about waste. When a firm can win a monopoly through the government, it will spend up to the value of the monopoly to get it. That money buys lawyers, lobbyists and lunches, and it produces no new goods. The pie shrinks while everyone fights for the slices.

The classic example is the incumbent who asks for tougher regulations because he can afford the compliance and his small competitors cannot. big companies love the regulations their small rivals cannot afford and tax complexity is a subsidy for lobbyists, and the code shows how it works show how common that is.

The steelman: officials are not all self-seekers

Fairness requires putting the opposing view at its best.

Public choice paints a cynical picture. Many legislators, judges and civil servants are public-spirited people who take real pay cuts to serve. Voters are not all rationally ignorant; many follow issues closely. Interest groups can also be a source of useful information and representation. And regulations sometimes do correct real problems, like pollution or fraud. A theory that sees only self-interest misses the best of democratic life.

That is a decent objection, and public choice theory has an answer, which has three parts.

1. The theory does not say everyone is selfish all the time. It says that when incentives and ideals conflict, the incentives win often enough to matter. A rule that works only if officials resist temptation every day is a bad rule.
2. Good people in bad systems still produce bad outcomes. A conscientious agency head who knows his budget depends on his program's size has a reason to defend the program even when it is failing, and to believe he is right while doing so.
3. The test is symmetrical. If we are allowed to assume that officials are saints, we must also allow the assumption that market actors are saints, and then no regulation is ever needed. The honest comparison is with real people on both sides.

The objection is right that public service exists. It is wrong that goodwill is a safe basis for a system of power.

Why this argues for constitutional limits

Here is where public choice becomes a conservative argument, and where it connects to the Founders.

If you take the incentive problem seriously, there are two responses. One is to look for better rulers: more virtuous, more expert, better trained. The other is to build rules that work even when rulers are ordinary. The Founders chose the second.

Madison wrote in Federalist 51 that if men were angels, no government would be necessary, and that if angels governed men, neither external nor internal controls on government would be necessary. His answer was to oblige the government to control itself, by dividing power and by making ambition counteract ambition. That is public choice theory, in 1788, in the language of a statesman. The same instinct appears in Montesquieu's warning, which Montesquieu Warned That Liberty Dies Where One Hand Makes and Enforces Law discusses.

Buchanan's term for the modern version is constitutional political economy. The most important decisions are the ones about rules. Once the rules are set, politics is a game played inside them. Change the game and you change the behavior. In practice that means measures conservatives have long defended:

• Limits on what government may do, such as enumerated powers, which narrow the prize that interest groups compete for. If Congress cannot hand out a favor, nobody will lobby for it.
• Balanced budget rules, discussed in a balanced budget amendment, the case for it and the conservative doubts, which force the cost of spending to appear alongside the benefit.
• Term limits and transparency, argued in Term Limits Work for Presidents, So Why Not for Members of Congress, which shorten the time a career can grow around a program.
• Regulatory budgets and sunset clauses, which make rules expire unless reviewed, like the proposal in A Regulatory Budget Would Make Washington Count the Cost of Its Rules.

Notice that none of this says "elect better people." It says design the system so the ordinary person in office does less damage and the ordinary citizen has a fighting chance.

What public choice does not say

Be wary of two misuses. First, it does not say government is always wrong. Defense, courts and police are real public goods, and conservatives have long defended them. As Conservatives Are Not Against Government, We Are Against Rule by Bureau argues, the target is unaccountable power, not the existence of a state.

Second, it does not tell citizens to give up. Rational ignorance can be fought. A citizen can learn one program well, a school budget, a zoning rule, a state regulation, and be effective where it matters. the politics pages and the red tape tracker on this site exist for that purpose.

The case in brief

1. Public choice theory applies economics to politics, assuming officials, voters and interest groups are people who respond to incentives, and James Buchanan won the 1986 Nobel Prize for developing it, including The Calculus of Consent (1962) with Gordon Tullock.
2. Concentrated benefits and dispersed costs explain why small organized groups beat a large unorganized public: in our example, 1,000 firms gaining $100,000 each beat 100 million taxpayers losing $1 each.
3. Rational ignorance, logrolling and rent-seeking turn those incentives into more spending, more regulation and more waste.
4. The theory does not claim officials are bad; it claims that systems should not depend on their virtue, which is Madison's logic in Federalist 51.
5. The remedy is constitutional limits, such as enumerated powers, balanced budget rules, term limits and regulatory budgets, not a search for better rulers.

What you can do: choose one program that your local government funds, find out who benefits and who pays, and bring that single question to the next public budget hearing.