Well, I wouldn't go as far as to say that a natural monopoly doesn't exist, but I think it's pretty clear that big companies have a lot of influence on the government, and typically can lobby the government to pass policies that benefit them, and make it harder for competition.

And I think there's an argument to be made that if the government were less powerful, then there would be less potential harm done when a corporation is able to influence the government.

I'm personally torn on this, because on one hand I think the government can be a useful tool in preventing monopolies, but on the other hand, I think expecting the government to not always work in favor of big companies seems naive.