the fundamental problem seems to be tying public school funding to taxes at a very local level. i was surprised when i found out that was the system in america; it seems like a very blatant rich-get-richer measure.
"Bad" urban schools with often poor student outcomes often have significantly higher spending per pupil than the tony suburban schools. There are lots of reasons why this would be the case of course. But it's not exclusively, or even primarily, a matter of relative spending levels.
It is not enough to defend privileged with taxation, institutions and laws but they must use astounding double-think to convince themselves that the result is somehow fair. Part of that self-indoctrination is putting huge effort into convincing everyone around them of these absurd views.