That's almost certainly true about the marginal value of the last bit of the subsidy and the crazy games around the formula for school funding. A simple, flat f

That's almost certainly true about the marginal value of the last bit of the subsidy and the crazy games around the formula for school funding. A simple, flat formula might be better. Having had friends who were in bad schools but who had parents who did care it's not clear that the public school system does listen much to people when they have an almost captive audience. Having had a parent and friends who are teachers in the public school system doesn't inspire much faith that where they are broken they are easy to improve either. The current system with all it's flaws but with distributed control and choice that saves the government money has some advantages.