What else would pay people in order for them to survive? This is not to say corporations or money are better than people, because if you ask me, when you put a company and a thousand dollar paycheck on one end of a scale and a person on the other, the person outweighs them by far. In fact, corporations are evil, businesses are evil, I don't support companies buying smaller companies, it just makes a messy market.
But one thing I do think is that labor is a necessary thing, you can pretty much call anything slave labor as long as you don't like it.
I don't see why people would be happy if they have a job that literally doesn't pay anything, though. Mind going in deeper on that?