Excluding fraud, theft, and so forth, just by definition, means we're talking about a utopia. It's not a system, it's some beautiful subset of what's really going on. The subset would have to be carefully selected, using information we don't actually have until (maybe) much later. Maybe never.
This 'free market' is a bit like clean matter-antimatter power stations. They sound like a great idea. We could build them if we knew how.
I never claimed free markets were utopian. The purpose of government in a free market economy is to provide justice for acts of force or fraud, and provide enforcement of contracts.
There is no such thing as a perfect free market. However, history shows that the closer we are to them, the more prosperous the country is.
BTW, when the Soviet Union was formed, the communists did away with the police because there would no longer be a need for them. Oops.