California does too. Parents get around it in all sorts of ways. Donating (and having your employer donate) to a 501(c)3 PTA that then directly funds many of the enrichment activities at the school. Parent volunteers for things like robotics classes. In-kind donations: my kid's teacher let slip that they were running out of paper, my kid shows up to class the next day with 2 reams. After-school enrichment through things like Kumon or RSM. Home tutoring. Study sessions after school.
I'm not sure it'd be desirable (let alone legal) to prevent that, though. The point is to raise up the kids that are doing poorly, not to make the kids doing well also do poorly.
I don't think that "home tutoring" or Kumon is "getting around" property tax redistribution. That's just raising your kid by investing your time and money, which is what parents have done since time immemorial.
I'm not sure it'd be desirable (let alone legal) to prevent that, though. The point is to raise up the kids that are doing poorly, not to make the kids doing well also do poorly.