"Umm, it's NOT "unfettered capitalism" if you can buy governments."
Yeah... because you say so. Any system goes the way it goes even if you try to put unreasonable limits to it. Capitalism is rightly based on the observed fact that we all are egotistic and takes that to the advantage of the common good (let's allow everyone to work for their own egotistic profit and the invisible hand will make that into the advancement of society as a whole). But then, you go with "hey! but this system we already understood as being composed of egotistic and corruptible individuals will only work if a subset of them, those making the rules, are *not* egotistic and corruptible". Surprise, surprise, those in command are moved by the same interests and profit motives as anyone else.
"the kind of government you can buy monopolies and such from is strong enough that capitalism is pretty much automatically fettered by the government."
And then remember that when the government is not strong enough for that, power ends up concentrating in other individuals/organizations that make their strength to be the rule of the land -go, i.e. to Somalia to see how well the "not strong enough government" works.
"So what you're describing as "unfettered capitalism" is actually "corrupt government" pointing fingers away from themselves..."
No: just the natural and unavoidable evolution of capitalism to its last consequences.