Because the power dynamic is asymmetric. That said, tools like collective bargaining and unionization can bring it closer to the market ideal - workers acknowl

Because the power dynamic is asymmetric. That said, tools like collective bargaining and unionization can bring it closer to the market ideal - workers acknowledging and taking advantage of their importance to the business to the same extent as the employer does. In practice, many external if not anti-free-market factors have made that grouping harder to do.