(Good. If they were too fucking stupid to do their research, they’ll be getting what they asked for. They may as well be buying the Brooklyn Bridge sight-unseen. Shame on their countrymen who are selling them on this crap, though.)
This being said, the problem stems as much from decline of manufacturing/realignment as it does from extreme and prolific corruption in Detroit. Cities have had one problem or the other and survived, but typically not both.
Chicago: extremely corrupt, but with a fairly diverse economy still.
Pittsburgh: no extreme corruption (some as always), but had to go through massive realignment after “Big Steel” died out in the US.