they have no political theory

Rothbard on Friedman&co.:

This is one of the problems with Friedmanites -- they have no political theory of the nature of the state. They think of the state, and this is true of Milton and the whole gang as far as I can see, as another social instrument. In other words, there is the market out here and then there is the state, which is another friendly neighborhood organization. You decide on which thing, which activity, should be private and which should be state on the basis of an ad hoc, utilitarian kind of approach. "Well, let's see, we'll feed the thing through the computer. We find that the market usually wins out, that the market is usually better." So, most of the time they come out in favor of the market on things like price control or government regulations, but they really think of the state as just another social instrument. And so when they come out in favor of the state, they go all out. In other words, there is no limitation. Well, they say, the state will do this. The state will run the educational system or whatever the cop out happens to be. So, they feed the thing in -- we'll have controls for a while and then they will die out -- it's not very important anyway. You see, they really think they can put through Friedmanism, let's say, just by educating Nixon. The sort of thing I said before jocularly, about Nixon reading Atlas Shrugged and being converted. That is really the sort of theory of social change the Friedmanites have. You see the President once in a while, you talk to him and you convince him that there shouldn't be price controls, the ICC should be eliminated, or whatever -- and then he goes ahead and does it. But it just doesn't work that way. They have no realization that the state is essentially a gang of thieves and looters. That they are exploiting the public, that they have a whole bureaucratic apparatus of exploitation, and that they are not just going to give it up. In other words, there is the whole problem of power involved which the Friedmanites refuse to face. They don't realize that the state is not a social instrument. It's an inimical organization which is hostile to society, plundering it, which has to be confined, whittled away, reduced and hopefully ultimately abolished. They have no conception of that at all. They just think of it as another friendly, corner grocer kind of thing which you either use or don't use.

"The New Banner Interview with Murray N. Rothbard"