Tom Sowell wrote

In The Vision of the Anointed(subtitled: Self-Congratulation as a basis for Social Policy):
The link may give you trouble, but it's easy to find any book from Laissez Faire Books' main page.

Third party decision making by surrogates for "society" offers no a priori reason to expect a closer approximation to omniscience. On the contrary, such surrogates not only lack the detailed and direct knowledge of the innumerable circumstances surrounding each of the millions of individuals whose decisions they are preempting, they lack the incentives of direct gain and loss from being right or wrong, and they have every incentive to persist in mistaken policies (from which they suffer little), rather than admit to being wrong (from which they could suffer much).

By the way, I just ran across Cantillon's Essai at Econlib.org which I've made my homepage. Oddly enough, it's listed under Hayek. Oh, I guess that's an essay on Cantillon written by Hayek. Cantillon's Essay is here.