Argument: A pure “free-market” is not a stable situation, but is rather merely a transitory phase preceding corporatism & authoritarian government.
1. In a free market economy, some win (retain profits) while others lose (go bankrupt)
2. In general, “it takes money to make money” - those who retain profits will benefit from “economies of scale,” compared to smaller competitors. “Winners” will find it easier to keep on winning, while “losers” will find it easier to keep on losing
3. Given this, wealth and capital will gradually concentrate, as the most successful buy up the assets of less successful competitors, who then face increased barriers to re-entry into the markets
4. Unchecked, this will eventually result in monopolies or oligopolies in many sectors (as we see today). At this point, the concentrated power of the oligopolies will make them difficult for others to challenge legally and possibly make them increasingly unpopular. The need (and ability) to employ organized armed force to defend (or increase) elite property will generally be proportional to the concentration of wealth.
Once oligopolies have sufficient (political/military) power, they will no longer need to compete using only market mechanisms, but instead can instead rely on fees, taxation, rent seeking, “bailouts,” or even conquest.
Conclusion: A free-market is an inherently unstable situation, which is not self-sustaining on its own.
Summary - A “free-market economy” resembles a large game of poker. It only lasts until one player has all the chips, which is inevitable, given the rules. A free-market could be sustained indefinitely, as a poker game could, but neither will do so spontaneously, on their own. To do either requires organization, planning, intelligence and will.