A free market is an economy based on competition, big fish eats small fish. We don't actually eat the competition, they are left as low wage providers for the big fish. All to the eventual point where there are only a few big fish and everyone else is a small fish. Big fish then become the size of governments, and you have what is known as an oligarchy. The final result is the centralization of services and production, which has the same unpleasant effects of communism.
