Although I wish the anarchists luck, since that's the way we ought to be moving now. But I believe we need government to enforce the rules of the game. By prosecuting anti-trust violations, for instance. We need a government to maintain a system of courts that will uphold contracts and rule on compensation for damages. We need a government to ensure the safety of its citizens–to provide police protection. But government is failing at a lot of these things that it ought to be doing because it's involved in so many things it shouldn't be doing.

A 1973 Interview with Milton Friedman – Playboy Magazine