Also this is an investment - not a donation. The expectation is that the $43b will drive direct ROI - not something that a donation to students will provide to an investor.
That's a good point. I guess I just question the value of having any more "direct ROI" when you already have a quarter of a trillion dollars. Surely, at that level, the things that improve the quality of your life -- especially to a systems thinker type -- are positive social changes?