We don't need to do anything. These hiring practices will tank these companies because they ignore reality. Apparently no one understands how bell curves work. As soon as you restrict your hiring pool to smaller and smaller groups based on arbitrary attributes that have zero effect on performance, you have no choice but to hire people that are less competent and qualified than others. This becomes especially true if the job is highly specialized.

Edit: To add, as time goes on morale will tank due to the competent being surrounded by the incompetent and people will leave because they're being overworked to make up the difference.