 At the other extreme stand conceptions of justice which posit some ideal principle of distribution such as equality, together with a ‘currency’ specifying the respect in which justice requires people to be made equally well off, and then refuse to acknowledge the justice of any claims that do not arise directly from the application of this principle. Thus claims deriving from existing law or practice are dismissed unless they happen to coincide with what the principle requires. More often, however, ideal justice is seen as proposing principles by which existing institutions and practices can be assessed, with a view to reforming them, or in the extreme case abolishing them entirely, while the claims that people already have under those practices are given some weight. Rawls, for example, whose two principles of justice count as ideal principles for this purpose, is at pains to stress that they are not intended to be applied in a way that disregards people’s existing legitimate expectations. About the ‘difference principle’, which requires social and economic inequalities to be regulated so that they work to the greatest benefit of the least advantaged members of society, he says: