 The main moral objection to desert-based principles is that they make economic benefits depend on factors over which people have little control. John Rawls has made one of the most widely discussed arguments to this effect (Rawls 1971), and while a strong form of this argument has been clearly refuted (Zaitchik, Sher), it remains a problem for desert-based principles. The problem is most pronounced in the case of productivity-based principles—people’s productivity seems clearly to be influenced by many factors over which they have little control.