Note that I'm using "corporation" here to refer specifically to the legal fiction, created by the State, that isolates the owners of a corporation from liablity. The "organization" itself might exist organized through some other means, of course. But using the modern, legal definition of "corporation", they depend on the State for their existence.

Now, you might ask, "mindcrime, aren't you just pedantically arguing about semantics then?" To which I'd say, no. The difference being that the modern, legal definition of "corporation" is a big part of what allows companies to grow very large, thanks to that ability to pool capital and dodge liability as an individual. If we didn't have the corporation (as we know it today) as a legal fiction defined by the State, it's very possible that we wouldn't have the huge mega-companies that you speak of.

Of course that raises the question of whether or not we'd be better off without those, but that's a whole other topic.