Bill Gates wants to help the 99% by improving school life for them. This article argues that instead of slightly raising the average among the 99%, we should instead help the top 1% and given that we now focus our budget on a lot less people, each of them will see bigger improvements.
Among other things, the article says "healthy childhood of few concerns without the relegation to daycare is the root of greatness". Unless they are independently wealthy before having kids, most normal parents will need daycare because they still need to work for money.
My personal opinion is that recent years have clearly shown us that we live in a winner takes all system and that wealth doesn't usually dribble down. Large companies keep billions in profit offshore, where they don't pay taxes (that could help education) and where the money surely won't help the middle class find jobs with livable wages.