You are aware how America works right, if you are poor and black: you work for peanuts, you can't get finance, you can't get health insurance, you can't afford education, if your up to your neck in water you will drown.
With New Orleans most of the reconstruction is halted due to insurance companies not paying out or folks not being insured and not having jobs because their employers went bust after the flood. There was a mass exodus out of New Orleans and the people have moved on. Who told you that there was masses of folks living in the abandoned parts of New Orleans? You are ill informed