My answer is that we've decided to make larger per capita investments in "outlier" individuals and the vast middle of the distribution population is accommodated with a standardized curriculum. I'm OK with that, though I'm concerned that we concentrate disproportionate resources on the left side of the distribution without investing enough on the right side.
I don't view the problem as "How should we use our limited resources to most effectively level the playing field?" but rather "How should we use our limited resources to most effectively foster the development of our future society?" It's no surprise that those two fitness functions result in different choices.
There was research that showed that IQ after 120 stops being correlated with success - other factors start being more important.
It's not about what those individuals deserve, it's about the societal return on the investment of their education. The potential return is simply greater.
Sire, but potential and actual are very different.