I am starting to think that there might be lot less competition on free markets than we think. And many markets tend to be established with big enough players. So they have stopped competing. If new entrants try to come well they might be undercut or simply bought out.
It is highly unlikely that big players are even able to emerge in a free market. All big businesses we know are big because they found a so-called moat. But I suppose we'll never know for sure as you have a greater chance of winning the lottery while simultaneously being struck by lightning than ever seeing a free market.