Aren't schools financed by local property taxes in US. And the rich parents pay more in taxes and there is more resources in the system.
Also well off parents could help school in other ways.
Also well off parents could help school in other ways.
Plus, in the case of NYC, rich PTAs more than make up the difference between what the state provides and what the students receive.
And then educational outcomes of the poor rural and poor (but expensive) urban schools aren't different.
http://www.bondbuyer.com/news/regionalnews/california-school...