It is curious that people tend to regard government as a quasi-divine, selfless, Santa Claus organization. Government was constructed neither for ability nor for the exercise of loving care; government was built for the use of force and for necessarily demagogic appeals for votes. If individuals do not know their own interests in many cases, they are free to turn to private experts for guidance. It is absurd to say that they will be served better by a coercive, demagogic apparatus.
It would be an instructive exercise for the skeptical reader to try to frame a definition of taxation which does not also include theft. Like the robber, the State demands money at the equivalent of gunpoint; if the taxpayer refuses to pay, his assets are seized by force, and if he should resist such depredation, he will be arrested or shot if he should continue to resist.
In fact, the libertarian would reason that the fact that human nature is a mixture of both good and evil provides its own particular argument in his favor. For if man is such a mixture, then the best societal framework is surely one in which evil is discouraged and the good encouraged. The libertarian maintains that the existence of the State apparatus provides a ready, swift channel for the exercise of evil, since the rulers of the State are thereby legitimated and can wield compulsion in ways that no one else is permitted to do.