Economists may not know much. But we know one thing very well: how to produce surpluses and shortages. Do you want a surplus? Have the government legislate a minimum price that is above the price that would otherwise prevail. That is what we have done at one time or another to produce surpluses of wheat, of sugar, of butter, of many other commodities. Do you want a shortage? Have the government legislate a maximum price that is below the price that would otherwise prevail.
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 FriedmanA private enterprise system needs some measuring rod, it needs something, it needs money to make its transactions. You can't run a big complicated system through barter, through converting one commodity into another. You need a monetary system to operate. And the instability in that monetary system is devastating to the performance of the economy.
Milton Friedman