The singular factor in all of the failing large American cities is the presence of a long term disease -- decades of Democrat rule.
Comrade Bill de Blasio, the mayor of NYC best stated it."
"When asked about the enormous gap between New Yorkâ€™s rich and poor, the mayor responded:What's been hardest is the way our legal system is structured to favor private property. I think people all over this city, of every background, would like to have the city government be able to determine which building goes where, how high it will be, who gets to live in it, what the rent will be. I think there's a socialistic impulse, which I hear every day, in every kind of community, that they would like things to be planned in accordance to their needs. Unfortunately, what stands in the way of that is hundreds of years of history that have elevated property rights and wealth to the point that that's the reality that calls the tune on a lot of development."
Central planning, the bane of civilization is de Blasio's method of dealing with a large city. Central planning ensured Russia, once a major exporter of wheat, never had a surplus after the fall of the czar. Nor, has any other communist nation. Industries were destroyed or never allowed to develop because of 5 year plans. Leftists are incapable of learning from the actions of the past, holding on to their faith based dogma.