Ok, so it's really one Austrian economist and one American economist quoted in a book by a second Austrian economist. Still, Knight did subscribe in part to the Austrian School of economics, so that counts for something.
Thus the typical citizen drops down to a lower level of mental performance as soon as he enters the political field. He argues and analyzes in a way which he would readily recognize as infantile within the sphere of his real interests. He becomes a primitive again. (Joseph A. Schumpeter, Capitalism, Socialism, and Democracy, 3rd edition, pp. 262-63.)
The probability of the people in power being individuals who would dislike the possession and exercise of power is on a level with the probability that an extremely tender-hearted person would get the job of whipping master in a slave plantation. (Frank H. Knight (1938), quoted in F. A. Hayek, The Road to Serfdom, p. 152.)