It is not zero-sum, there is not a fixed amount of wealth in either the US economy nor the global economy. If we educated everyone, and everyone with potential reached their potential and contributed to the economy, we can all have more wealth. It’s not a requirement that someone lose, and this is what I meant by a return of two dollars for every dollar spent.
> The way you boost smart poor children is by taking money from non-poor parents. ... how much redistribution is appropriate...
In practice, we could fund university education for all in the margins of what we willingly spend on the military or several other programs, people have been pointing this out for decades. It doesn’t have to be a change in taxation for anyone, nor does it need to come from “non-poor” disproportionately.
But, larger picture, I find it ironic that you use the word redistribution with respect to the rich, but not with respect to the poor. Where does rich people’s money come from? And if you’re going to worry about rich people funding social programs, how about also tallying the benefits they get from national infrastructure that poor people also have to pay for?