The key insight of Adam Smith's Wealth of Nations is misleadingly simple: if an exchange between two parties is voluntary, it will not take place unless both believe they will benefit from it. Most economic fallacies derive from the neglect of this simple insight, from the tendency to assume that there is a fixed pie, that one party can gain only at the expense of another.
Milton FriedmanWe measure poverty by what I believe is a very, very crude concept. We actually measure poverty by trying to get some kind of an estimate of the minimum expenditures on food that are required to maintain health, multiplying that number by three, and saying that's the level of poverty. And it's a very crude, inaccurate arrangement.
Milton FriedmanThe black market was a way of getting around government controls. It was a way of enabling the free market to work. It was a way of opening up, enabling people.
Milton FriedmanWhat central banks can control is a base and one way they can control the base is via manipulating a particular interest rate, such as a Federal Funds rate, the overnight rate at which banks lend to one another. But they use that control to control what happens to the quantity of money. There is no disagreement.
Milton Friedman