Disallowing discretionary funding and efforts for education would be what could charitably be called deeply misguided approach to try to make it fair for everyone. (Allowing every possible advantage taken literally would get into no shit answers like cheating or bribery not being okay.)

I recall hearing from New Jersey and judges taking strict stances of equal outcome in education that found locality funding discriminatory, was that the poorer districts needed to be funded more per student to start to reach parity. Which makes some sense on some levels given knowledge and habits from parents transferring and would need more effort and funding to catch up because they are already providing more teaching just in a remotely middle-class concept.

That sort of equality is clear folly, like trying to force every kid into creches and separate them from parents. It might work with some hypothetical aliens but in practice for humans prepare for massive psychic trauma, inevitable abuse from caretakers, and frankly a well deserved outright insurrection and rebellion.

Don't get me wrong, working to raise the floor is a noble goal and makes sense just from rational selfishness alone. Throwing more money at the high end is 'dimminshed returns' but the money has already been allocated for better or worse. And well the obvious caveats of how the money is spent matters, there is no fixed true universal value per of any unit or commodity.