The elitists should not be trusted with power, and the romantics should not be trusted to give it to them. The promise and problem of libertarianism is to enable those who desire freedom to escape the power-lust of the Statist elites and the ignorance of the Statist romantics into a system of voluntarism. In libertarian theory, people are permitted to spend their money in any peaceable way. The only restrictions are against criminal behavior. For instance, it remains illegal for people to purchase the services of a hit-man to take care of an annoying party.
People remain free, in libertarianism, to purchase goods and services for self-defense.
For instance, a person may purchase a gun to protect against criminals and may purchase security systems and personnel. In short, money for self-defense is good, money for criminal activity is bad. This principle applies to the political process. People should not be restricted from spending money to protect themselves from political plunder. A contribution to a candidate supportive of the free market is merely a form of self-defense.