China is an interesting example too because it's basically capitalist with strong government oversight. So you can go hog wild on exploiting labor and amassing wealth as long as you don't oppose the overall goals of the government. We'll see how long they can keep it running - the problem with most authoritarian systems is that they're only as good as their current leadership, and when that changes things tend to fall apart.
Or get TOO big. You can get a few billion here and there, but don't think that you're bigger than the government. And don't act like it, either.
The nuance that capitalist businesses do not hold an exclusive interest now or historical pioneering of labor exploitation is valuable to keep in mind because no matter how far the project of labor power spreads, all we workers must keep in mind that we have a primary and vested in empowering the most diminished of our society.