>You might accept this contract and we might call it "voluntary" since you agreed to the terms, but that's hardly a fair characterization of the situation. Power differentials matter, and they absolutely produce compulsion.

But noo, you enter into a contract voluntarily, it's not exploitation because you can leave your employer. Agh! Marx got it right on the money 150 years ago. It's incredible how the obvious escapes these misty eyed libertarians.