"In his testimony before the commission, Mr. Westmoreland said he did not want to command an army of mercenaries. Mr. Friedman interrupted, "General, would you rather command an army of slaves?" Mr. Westmoreland replied, "I don't like to hear our patriotic draftees referred to as slaves." Mr. Friedman then retorted, "I don't like to hear our patriotic volunteers referred to as mercenaries. If they are mercenaries, then I, sir, am a mercenary professor, and you, sir, are a mercenary general; we are served by mercenary physicians, we use a mercenary lawyer, and we get our meat from a mercenary butcher.""
He was fighting against what Kenneth Boulding called "the manpower concept".
Friedman was one of the greatest economists of the twentieth century, and Paul Krugman (in the essay where he referred to him as "a great economist and a great man") reminds us why:
"Keynesianism was a great reformation of economic thought. It was followed, inevitably, by a counter-reformation. A number of economists played important roles in the great revival of classical economics between 1950 and 2000, but none was as influential as Milton Friedman. If Keynes was Luther, Friedman was Ignatius of Loyola, founder of the Jesuits. And like the Jesuits, Friedman’s followers have acted as a sort of disciplined army of the faithful, spearheading a broad, but incomplete, rollback of Keynesian heresy. By the century’s end, classical economics had regained much though by no means all of its former dominion, and Friedman deserves much of the credit.
I don’t want to push the religious analogy too far. Economic theory at least aspires to be science, not theology; it is concerned with earth, not heaven. Keynesian theory initially prevailed because it did a far better job than classical orthodoxy of making sense of the world around us, and Friedman’s critique of Keynes became so influential largely because he correctly identified Keynesianism’s weak points."