Quite the opposite, actually. It is actually through government intervention that almost all monopolies form, let alone survive. Remember, tv licenses, radio licenses…any sort of media business requires some sort of government approval. This limits the market…this is the exact opposite of “no barriers to entry”. It is the government barriers that create such a dominance of only a few firms…because only a few firms are even allowed to be in the industry. Milton Friedman speaks on this…
More on monopolies:
Is statism needed to protect against corporate monopolies?
Is natural monopoly really impossible?
Another facet is the argument that there is actually an upper limit to how big a company can (naturally) get before its sheer size actually hurts profitability. Doug French actually spoke on this at the Mises Circle in January this year.
- “Destroying Capital with the Printing Press” lecture by Doug French, January 2011 (published as Mises Daily “Merger Monday and the Destruction of Wealth” here)