To me, this sentence and the ones that follow are by far the most salient point.
How many Zuckerbergs, Gates, Brins, Pages and Bezos are we missing out on due to the fact that huge swaths of our country do not have the ability to fully explore and develop their talents? How many trillions in lost GDP does that amount to?
To me, this entire debate is a missed opportunity to discuss inequality on the basis of shared wealth, growth and prosperity. Instead we tend to debate these things on a moral dimension which immediately politicizes and polarizes the matter. See renewable energy for another example of how that works.