I don't know the answer, so I was just pointing that out since the word diversity rarely comes with with economics. However, I think that since OP pointed out i

I don't know the answer, so I was just pointing that out since the word diversity rarely comes with with economics. However, I think that since OP pointed out it's a meritocracy you get kids whose parents really care, and not poor kids whose parents are working all the time. That tends to be cultural to some extent.