well, apart from everything else (and i think billionaires have some left overs): the reliance of the us social "system"on gifts is creepy and kind of medieval - why should education need private sponsors at all??? there are certainly countries, with better education than the us, that do without ...
it is a bit more complex with international project support; but there, any billion ut of somebodies pockets is "peanuts" compared to government money spent on "peace and stabilization missions" - in iraq and elsewhere.
so, maybe some 10000 from the jobs family towards the democrats may matter, in the end, more than m$ billions ...