The casinos never plowed any of the money back into the city, so they remained monied islands in a crackhead dump.
They could have fixed the city up, drove up real estate prices, raised the standard of living all around - it would have been good for long term business.
But they didn't and now that people have options, nobody wants to visit their ghetto anymore.
Probably a fair amount of $$$ was skimmed off by the mafia and the gov’t.