That's not true technically. If unintelligent people such as yourself, haven't been misrepresenting voluntaryism for decades -for the sole purpose to scare people- then you have no idea if voluntaryism would compete or not. You say it can't compete in a Free Market, the only problem is that it isn't a free market of ideas. It is a controlled market; there is a difference.
The funny thing is, even with the market being heavily controlled Volutaryism is growing as is true Constituionalists. As the walls come down on the contrlled market the number of really small government and voluntaryists grows rapidly.