This has been a popular topic on the Right over the past few weeks, starting I think with Arthur Brooks’s new book on the topic. The book has drawn a pretty fair amount of attention.
Since then, John Hinderaker notes a Mitt Romney speech, David Weinberger has a good post on the morality of conservatism, and Kevin Williamson has an outstanding post on Detroit’s State-sponsored failure.
As the story goes, Mises blew apart socialism with his Economic Calculation in the Socialist Commonwealth and his subsequent, aptly-titled book, but it was Hayek’s moral case which we tend to cite more. Technical arguments are important, but moral arguments sway people more.