In a truly free market any company should be able to purchase anything they can that is legal.
One of the things that a company can purchase is government itself: they can lobby to pile up regulations that only companies their size can afford, they can lobby to decrease taxes only on products/services they provide, etc.
And this is exactly what they do.
So the bastardized version of welfare-state capitalism that we are currently living under is not an aberration, but is the end result of corporations purchasing the things they want, i.e. bigger government.
If you oppose the right of corporations to purchase government action then you are anti-capitalist because you are limiting what they can purchase.
If you support the right of corporations to purchase government action then you are anti-capitalist because you would then have to support the welfare nanny state that has resulted.
This is why there is no such thing as a truly "free market" and there never will be and anyone who believes otherwise is an ideologue more concerned with bolstering up a utopian vision than improving the situation in the real world.
Astounding. By your logic one is either an anti-capitalist or an anti-capitalist.
You are correct that free enterprise is impossible when government prevents competition based on its support of anticompetative industry. You are wrong, however, when you claim that only corrupt government can exist in a buyers market.