I once wrote this:
How can a supposedly rational economist, politician, pundit, or “liberal” imagine that the benefits accruing to some persons (commuters, welfare recipients, etc.) somehow cancel the losses of other persons (taxpayers, property owners, etc.)? There is no valid mathematics in which A’s greater happiness cancels B’s greater unhappiness.
Yet, that is how cost-benefit analysis (utilitarianism) works, if not explcitly then implicitly. It is the spirit of utilitarianism (not to mention power-lust, arrogance, and ignorance) which enables Barack Obama and his ilk throughout the land to impose their will upon us — to our lasting detriment.
Uwe E. Reinhardt, an economics professor at Princeton, puts it this way:
The problem with welfare analysis is not so much that ethical dimensions typically enter into it, but that economists pretend that is not so. They do so by justifying their normative dicta with appeal to the seemly scientific but actually value-laden concept of efficiency….
[E]conomists lean on a welfare criterion first proposed in the late 1930s by the eminent British economists Nicholas Kaldor and Sir John Hicks. It is an intuitively appealing criterion, if one does not think too deeply about it….
…As the economist Steven E. Landsburg explains it bluntly to students in “Price Theory and Applications” :
In applications, the Kaldor-Hicks criterion and the efficiency criterion amount to the same thing. When Jack gains $10 and Jill loses $5, social gains increase by $5, so the policy is a good one. When Jack gains $10 and Jill loses $15, there is a deadweight loss of $5, so the policy is bad.
Evidently, on the Kaldor-Hicks criterion one need not know who Jack and Jill are, nor anything about their economic circumstances. Furthermore, a truly stunning implication of the criterion is that if a public policy takes $X away from one citizen and gives it to another, and nothing else changes, then such a policy is welfare neutral. Would any non-economist buy that proposition?
Readers will notice an irony in the widespread acceptance of the Kaldor-Hicks criterion by economists. On the one hand, they claim that their science is rooted strictly in the personal preferences of individuals in society, which seems democratic. In their application of the Kaldor-Hicks criterion to real-world problems, however, economists act like collectivists who seek to allocate society’s resources under a preferred moral doctrine. Economists take on the role of a benevolent dictator presumed to be empowered by someone to redistribute welfare among individual members of society for a larger social purpose — increases in what economists call efficiency and the maximization of what they call overall social welfare.
“Social welfare” (“efficiency”) is an excuse for politicians to play God. An economist who abets such behavior is a shill, not a scientist.
Politics and Prosperity 