Milton Friedman
From dKosopedia
Milton Friedman is the leading popularizer of "Free Market" (actually Market Fundamentalist), laissez-faire approaches to economics. Most famously, he is the intellectual force most strongly associated with the movement to replace public schools with school vouchers.
Unlike many conservative academics, Friedman is essentially Libertarian in outlook. Friedman is a strong intellectual influence on the Neoconservative movement.