 Yet despite these efforts to reconcile justice and utility, three serious obstacles still remain. The first concerns what we might call the currency of justice: justice has to do with the way that tangible benefits and burdens are assigned, and not with the happiness or unhappiness that the assignees experience. It is a matter of justice, for example, that people should be paid the right amount for the jobs that they do, but, special circumstances aside, it is no concern of justice that John derives more satisfaction from his fairly-earned income than Jane does from hers (but see Cohen 1989 for a different view). There is so to speak, a division of labour, under which rights, opportunities, and material benefits of various kinds are allocated by principles of justice, while the conversion of these into units of utility (or disutility) is the responsibility of each individual recipient (see Dworkin 2000, ch. 1). Utilitarians will therefore find it hard to explain what from their point of view seems to be the fetishistic concern of justice over how the means to happiness are distributed, rather than happiness itself.