Economically, that doesn't make the slightest bit of sense.

If a business pays employees more than the market rate, it will be less profitable and thus more likely to fail. If a business pays employees less than the market rate, it will lose employees to competitors and it is thus more likely to fail.

Also, to say that "men decided" is pretty strange. It suggests a conspiracy, and it suggests that there are no women who could start companies or otherwise be in management.

So you've apparently just proven that no discrimination exists in the business world. South Africa's native population was just too stupid to work any job, until Nelson Mandela was freed, instantly improving their skills to make them eligible for employment.

Nobody would forgo a good bread, so Germans writing "Germans don't buy from jews" on bakery windows were just making the case that the bread had, within a few years, become intolerable. Hollywood studios stopped hiring communists because communists just aren't very funny. etc...