Not sure that I'm seeing the problem here... since when are the rich jealous of the poors' education?
And here is the bit where Gates/Zuck benefit (possibly now, certainly in the future):
> You have technology -- like tablets -- often standing in place of teachers...
Gates/Zuck [could] make more money selling tech to these schools (probably not through tuition, though, because it's only $6/month).
[I see the benefits being long-term edu foothold, not short-term profiteering]
Edit: Added edits in [].