> Well, some public policy differences would be continuing to invest ever increasing amounts of money on the worst performers in schools in an attempt to get them up nearer the average.
I'm not sure I follow. Are you suggesting that we, as a society, should not invest in worst performers? How would we even know beforehand? And how would withdrawing such funding from "bad" schools not affect the opportunity of all of the children of that school?
What's your point about the gender ratios of certain occupations? That it's a waste of money to try to alter?