I first heard of Milton Friedman when I was interviewed an undergraduate applicant to the College at the University of Chicago. I told the interviewer that I knew that I was going as a conservative into a liberal shark den. Diplomacy at that stage of my life was not very well developed. Are you in favor of the negative income tax queried the interviewer? No, I replied. I am opposed to welfare, and giving out taxpayer’s money to those who have not earned it. Well, replied my patient elder, the idea behind the proposal is to encourage work by giving...