It starts with statistics...
..and carries on until the more obsessed looks start looking at ideas like "Positive Discrimination" and quotas that are inherently racist/sexist - i.e. You're screwed if you're a white male in this example.
Not one lefty-PC drone considers whether it is simply a case that, for whatever reason, less people in some of their discriminatory groups/labels are just not interested in a given career, or perhaps that the few candidates who are just aren't as good as their peers.
Jobs, pay etc should be on merit, not meeting made-up statistics.