I'm not sure why "you people" leap to the conclusion that anyone who bitches on social media about policies or policy failures has spent their moral impetus and does nothing else. It's a straw man argument, at best, and irrelevant in any case. It fails the Universal Test: you can throw it at anyone, regardless of fact or circumstance. That's an insult, not an argument.
Also, social media-driven outrage can be socially powerful. I don't why you dismiss it as self-indulgently useless.
Since most school districts receive the majority of their funding from local property taxes, your solution effectively reduces funding to the school.
The problem arises because of the economic inequality created by high level policies. It won't be solved by draining school coffers with tax breaks.
"If you can keep your head while those around you are losing theirs, you can collect a lot of heads."
Homo sum, humani nihil a me alienum puto.
-Terence