Now that I think about it (and getting to Pro's question), there were a few mentions of corporations in DS9. I don't know if they were human companies or not, though. It does seem that the Federation itself was socialist, though how it worked was never explained. I just write all of this off to my theory that sometime in the 70's, Roddenberry lost his fucking mind.

whomod said: I generally don't like it when people decide to play by the rules against people who don't play by the rules.
It tends to put you immediately at a disadvantage and IMO is a sign of true weakness.
This is true both in politics and on the internet."

Our Friendly Neighborhood Ray-man said: "no, the doctor's right. besides, he has seniority."