The fundamental problem
The fundamental issue is an aspect of the "free market" that people often overlook -- without regulatory limits, there can be no free market at all. The natural evolution of any market is that there is a winner. The winner gains more power -- in other words, the ability to dominate the market and exclude competitors. The end result, absent some sort of intervention, is always monopoly.
Left to itself, the "free market" will always self-destruct.