I would say that in this world, the greatest source of inequality has been special privileges granted by government.
Milton FriedmanThe Great Depression in the United States, far from being a sign of the inherent instability of the private enterprise system, is a testament to how much harm can be done by mistakes on the part of a few men when they wield vast power over the monetary system of the country.
Milton FriedmanThe collapse of communism in essence added tens and tens of millions of people to the world labor supply, and the people who were added had previously been getting very low income, but they were not unskilled. Many of them were fairly well educated.
Milton Friedman