It's what is already happening though, with corporations becoming increasingly monolithic and wealth becoming increasingly concentrated. Why would this trend change, seeing as the process feeds itself? More wealth means more power means more ability to tilt the table to one's own advantage means more wealth.

If companies were interested in being fair, they would have shared the fruits of increased productivity of their employees with their employees. Instead, they do everything they can to squeeze the employees and increase their own take. Why ever would they suddenly have such a fundamental change of heart and share the fruits of increased productivity achieved through AI, which doesn't even come from the employees?

It all seems pretty obvious.