Or that's how I interpret what GP said. Happening a bit where I live: richer families don't want their kids go to school in problematic suburbs.
> noisy school-is-boring kids sabotaging the classes for everyone.
It seems that those parents realize that if the system does not care about ensuring that kids in school actually learn things, then they better leave than trying to fix the kids of others (i.e., parents who does not care).
I would argue that it is a net positive for those public schools: those parents still pay local taxes while making sure that there are fewer students -> better student/teacher ratio.
And yes, schools are funded by local taxes, but it doesn't have to be that way: if states really wanted to, they could take that power away from municipalities. The constitution gives the states broad powers to run themselves as they like.