In the twenty-first century US as in thirteenth century china.
昔孟母，择邻处。
(I would claim that people, in the time of de Vos as in the time of Mencius' mother, don't vote with their feet to choose schools as much as choose their childrens' classmates, and perhaps especially the parents of their children's classmates, but I'm a cynic.)
"94027 children wear grey. They work much harder than we do, because they're so frightfully clever. I'm really awfully glad I'm a 94301, because I don't work so hard. And then we are much better than the 95112s and 95023s."
People choose schools by moving house.