I wonder how companies marketing their roles at "market rates" does not amount to wage-fixing? If every company agrees that work should cost them $x at most, then you don't really have supply and demand principle. I think this is only legal because because it is hard to prove within current legal framework. I think we should have a regulation that will make employers redistribute 30% of profits among workers as a bonus. That may of course lead to companies making artificial loses (as they do to avoid paying corporation tax) and ultimately a cat and mouse game.