This is a really naive way to look at things. For some reason you seem to believe that people that run corporations have better intentions that people who are in the government/politics.
I'm not sure what you really mean by "monopoly" or what sort of monopoly you think can persist in the absence of government support.
Note, I started my participation in this thread by advocating for minimizing government, which is not the same as eliminating government. So I'm not trying to assert an absolutist position that free markets should have no regulation.