The problem with that, even under more ideal circumstances, is that it makes the schools in black schools even worse as anyone who gives a shit about education has already left. Current laws means the "bad" school will get additional funding, which will all go to bureaucracy or some other vanity project (like, say, if some bleeding-heart thinks it's a good idea to get, say, MacBooks for students, it means most of those will end up in a sketchy pawn shop if not completely destroyed). If the school district pulls the plug on the school, then land values plummet and the neighborhood is worse off than before.