Should companies pay more to more productive workers?
Up to a point. But gauging productivity is not an exact science in many business environments. As a mid-level manager, it was my job to assess the productivity of my employees and to make the case to higher level managers as to what those employees should be paid.
Paying an employee too much is an error just as paying an employee too little is an error.
I think Jordan Peterson points out that women tend to be more "agreeable" and thus tend to tolerate lower pay than a similarly situated man. This tendency explains some of the gender pay gap.