The government has no right to tax earnings from labor. Taxation of this kind requires the laborer to devote a certain percentage of hours worked to earning money for the government. Thus, such taxation forces the laborer to work, in part, for another' s purpose. Since involuntary servitude can be defined as forced work for another' s purpose, just as involuntary servitude is pernicious, so is taxing earnings from labor. The argument uses which one of the following argumentative techniques? ['citing the authority of an economic theory in order to justify a moral principle', 'inferring that since two institutions are similar in one respect, they are similar in another respect', 'deriving a general principle about the rights of individuals from a judgment concerning the obligations of governments', 'presupposing the inevitability of a hierarchical class system in order to oppose a given economic practice']