Many libertarians embrace public choice theory as a sophisticated, intellectually rigorous political analysis that is consistent with libertarian ideas. This does not mean that libertarians should accept it uncritically.
Public choice theory looks at politics through a lens that treats politicians as selfish actors striving to maximize their power and self-interest, not as people chiefly motivated by the public good. Public choice theory has identified several structural defects in the American political process that lead politicians to destroy liberty as a byproduct of their self-interest. One such defect is the dispersion of interests problem, the fact that a rent-seeking law imposing taxes to help a special interest group has a highly concentrated interest group to lobby for it, whereas the interest to lobby against it is dispersed over the entirety of the taxpayers. Individual taxpayers aren’t sufficiently aware of the tax to be highly interested in fighting it.
Another defect is the fact that politicians usually get noticed by the media for what they do, and not for what they don’t do, so election campaigns tend to reward politicians for being active, which leads to bigger government. Because of the fame that attaches to moralistic crusades, the structure of democracy also rewards legislatures for passing new criminal laws, which leads to overcriminalization.
It is the beliefs of the people that caused the decline of liberty and the rise of big government in post-New Deal America.
But despite public choice theory’s analytical value and libertarian leanings, I would argue that it is mistaken about the fundamental cause of statist laws. As an alternative to public choice theory I would present the rule of intended consequences: the reason for the existence of any given law in a republican democracy is the voters’ belief that the law is good and performs a just purpose; the unintended consequences of a law are usually not the primary reason for that law’s existence. This rule holds that the best way to get an unjust law repealed is to persuade the voters that the law is unjust, so that voter pressure will lead the politicians to repeal it.
For example, the reason why gambling is illegal is that mainstream American voters have inherited a Puritan conservative Christian morality dating back to the colonial era, and they feel that gambling is evil and should be illegal. The Indian casino owners and the casinos in Las Vegas and the state lotteries all benefit from the anti-gambling laws. And they all have lobbying power. But despite the lobby whose interest is favored by criminalization, the primary reason for the anti-gambling laws is the feelings of the voters, not the lobbying of the special interests who benefit from the law. If the voting public did not believe that gambling should be illegal, then it would be legalized.
I doubt that any amount of lobbying or special interest funding could keep gambling from being legalized if the politicians thought that the voters strongly favored its legalization. Legislators who fought the tide of public opinion would simply be voted out and replaced by legislators who would obey the public will. Gay marriage and Prohibition are two other examples showing that the law tends to change when the beliefs of the voters change. The rise of gay marriage laws and both the start and end of Prohibition illustrate the fact that politicians will adopt policies that were once unpopular if they see that the mainstream beliefs of the public have changed.
I would characterize the debate between public choice theory vs. the intended consequences rule as a quarrel between structure and belief. Public choice theorists think that the structure of a republican democracy disadvantages liberty and favors the growth of government. In contrast, I think it is the beliefs of the people that caused the decline of liberty and the rise of big government in post-New Deal America. The rise of socialist sympathy in the Democratic Party in the 1930s coincided with the seepage of socialist theories from the late 19th century into the consciousness of the American public. The expansion of our government has followed Americans’ abandonment of the libertarianism of the American Revolution and their acceptance of modern liberal dogma.
If I am correct, then the key to restoring liberty is not to alter the institutional structures of the nation. Instead, the key is to persuade the voting public to believe in liberty, to transform the people’s moral sentiments so that they feel that statist laws are unjust. This challenge may seem difficult to meet, but altering beliefs would be easier than the task presented by public choice theory, which would be nothing short of fundamentally altering the structure of American government. Public choice could probably succeed only through a series of libertarian constitutional amendments, which seems unlikely. The war of ideas and persuasion is the right path for libertarians to focus on.