The answer is in your question.
Everything.
About $1T less than what we're spending right now.
We all do.
Nice sound bites and, sincerely, I believe your heart is in the right place, but your trying to put sugar on a very large turd. You are oversimplifying, as many people do here, a very complex problem. Worse, our national leaders are doing the same thing.
The world is complex and, as the great Ronald Reagan once said, our children are our nation's greatest resource...and, in 2021, it's clear we are failing our children.
As a nation, we don't properly care of them, we don't properly prepare for their future and we have a really, really nasty habit of kicking the can down the road.
The evidence is the National Debt. The evidence is growing population of native Americans who are becoming less competitive in a modern world because We, the People do not put education as a major priority.
Why don't We, the People care about educating kids? It's obvious. First, it doesn't do shit for the adults who have livestyles to support here and now.
Second, educating a six year old won't pay off until they are 25-30. That's about 20-30 fucking years just to see a profit? What good investor would invest in that long term gamble? Better, in their minds, to look for shorter term profits and let the fucking future take care of itself.
Third...well, you don't give a fuck about third because you're too busy thinking about yourself and the here & now as reflected in the vast majority of your posts.