I would say that the discourse is insufficently precise in accounting for variables as well. One complication found is also that the better off need less funding in the first place. Which makes some sense upon reflection - parents who are illiterate in the local language for whatever reason would be incapable of providing "baseline" assistance in knowledge transmission. Asking for 100% equal outcomes would clearly result in a procrustean bed but counterintuitively equal opportunity does not require equal input costs as convenient as it would be.

This awkwardly also highlights ignored externalities and implied awkward questions in ways essentially nobody is comfortable is with the implications of especially regarding free choice and perverse incentives where the "best" option still has messed up implications.