Economist Quotes and aphorisms about system Thomas Sowell Thomas Sowell Milton Friedman Milton Friedman Milton Friedman Milton Friedman Alan Greenspan ,, What a sound money system does is to stabilize all the elements in it, and reduces the uncertainty ... Paul Samuelson ,, My family was well off but not rich. I spent the four years I was an undergraduate working on the b... Paul Samuelson Herbert A. Simon