It's not as simple as that. There are a lot of rural areas where teachers make almost nothing. Chicago can afford to spend a lot of money (since it has rich are

It's not as simple as that. There are a lot of rural areas where teachers make almost nothing. Chicago can afford to spend a lot of money (since it has rich areas it can tax). So they spend a lot on schools in poor areas of the city. And then educational outcomes of the poor rural and poor (but expensive) urban schools aren't different.