The Kantian philosophy is no more than at best a half-secularized version of such a theocratic ethics, with “Reason” in the place of God. This does n… - Raymond Geuss

Asking what the question is, and why the question is asked, is always asking a pertinent question.

Diverting attention from the way in which certain beliefs, desires, attitudes, or values are the result of particular power relations, then, can be a sophisticated way of contributing to the maintenance of an ideology, and one that will be relatively immune to normal forms of empirical refutation. If I claim (falsely) that all human societies, or all human societies at a certain level of economic development, have a free market in health services, that is a claim that can be demonstrated to be false. On the other hand, if I focus your attention in a very intense way on the various different tariffs and pricing schema that doctors or hospitals or drug companies impose for their products and services, and if I become morally outraged by “excessive” costs some drug companies charge, discussing at great length the relative rates of profit in different sectors of the economy, and pressing the moral claims of patients, it is not at all obvious that anything I say may be straightforwardly “false”; after all, who knows what “excessive” means? However, by proceeding in this way I might well focus your attention on narrow issues of “just” pricing, turning it away from more pressing issues about the acceptance in some societies of the very existence of a free market for drugs and medical services. One can even argue that the more outraged I become about the excessive price, the more I obscure the underlying issue. One way, then, in which a political philosophy can be ideological is by presenting a relatively marginal issue as if it were central and essential.

The actual effect of Rawls’s theory is to undercut theoretically any straightforward appeal to egalitarianism. Egalitarianism has the advantage that gross failure to comply with its basic principles is not difficult to monitor, There are, to be sure, well-known and unsettled issues about comparability of resources and about whether resources are really the proper objects for egalitarians to be concerned with, but there can be little doubt that if person A in a fully monetarized society has ten thousand times the monetary resources of person B, then under normal circumstances the two are not for most politically relevant purposes “equal.” Rawls’s theory effectively shifts discussion away from the utilitarian discussion of the consequences of a certain distribution of resources, and also away from an evaluation of distributions from the point of view of strict equality; instead, he focuses attention on a complex counterfactual judgment. The question is not “Does A have grossly more than B?”—a judgment to which within limits it might not be impossible to get a straightforward answer—but rather the virtually unanswerable “Would B have even less if A had less?” One cannot even begin to think about assessing any such claim without making an enormous number of assumptions about scarcity of various resources, the form the particular economy in question had, the preferences, and in particular the incentive structure, of the people who lived in it and unless one had a rather robust and detailed economic theory of a kind that few people will believe any economist today has. In a situation of uncertainty like this, the actual political onus probandi in fact tacitly shifts to the have-nots; the “haves” lack an obvious systematic motivation to argue for redistribution of the excess wealth they own, or indeed to find arguments to that conclusion plausible. They don't in the same way need to prove anything; they, ex hypothesi, “have” the resources in question: “Beati possidentes.”