The existence of a free market does not of course eliminate the need for government. On the contrary, government is essential both as a forum for det… - Milton Friedman

You cannot simultaneously have free immigration and a welfare state. ... I am in favor of the unilateral reduction of tariffs, but the movement of goods is a substitute for the movement of people. As long as you have a welfare state, I do not believe you can have a unilateral open immigration. I would like to see a world in which you could have open immigration, but stop kidding yourselves. On the other hand, the welfare state does not prevent unilateral free trade. I believe that they are in different categories.

In the course of General Westmoreland's testimony, he made the statement that he did not want to command an army of mercenaries. I stopped him and said, 'General, would you rather command an army of slaves?' He drew himself up and said, 'I don't like to hear our patriotic draftees referred to as slaves.' I replied, 'I don't like to hear our patriotic volunteers referred to as mercenaries.' But I went on to say, '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.' That was the last that we heard from the general about mercenaries.

Even the most ardent environmentalist doesn’t really want to stop pollution. If he thinks about it and doesn’t just talk about it, he wants to have the right amount of pollution. We can’t really afford to eliminate it—not without abandoning all the benefits of technology that we not only enjoy but on which we depend. So the answer is to allow only pollution that’s worth what it costs, and not any pollution that isn’t worth what it costs.