Make it 30 minutes, and you're about right.
While I agree with some of your points, I'll take issue with this statement. In my opinion, the lack of parental participation and school/legislative policy have degenerated in a vicious cycle. Schools try to do more to help kids, while discouraging/preventing parental influence on school policy. As a result, parents are less involved, which leads the school to do more, etc.
As for "day long day care" - so true. Look no further than the push for 4k and Head Start, which have repeatedly and consistently failed to produce lasting benefits, while costing taxpayers *billions*. There's no educational justification for it.
Secondly, if you want a larger spread, you don't get a larger barrel--it's 12gauge (or 40, or whatever) all the way down. You can get barrels with different chokes, which constrict the opening at the end of the barrel to various degrees.
Government sticking its thumb on the scales of the economy is always a bad idea--whether it be bailing out banks or perpetual ethanol subsidies + ethanol mandates + import tariffs.
I don't know anybody under the age of 55 who is planning on receiving benefits from SS when they retire.