“Those who claim that taxation is, in some mystical sense, really “voluntary” should then have no qualms about getting rid of that vital feature of the law which says that failure to pay one’s taxes is criminal and subject to appropriate penalty. But does anyone seriously believe that if the payment of taxation were really made voluntary, say in the sense of contributing to the American Cancer Society, that any appreciable revenue would find itself into the coffers of government? Then why don’t we try it as an experiment for a few years, or a few decades, and find out?”