That's what was said about New York City 40 years ago. What they need is conservative leadership, law and order and a focus on job growth and quality of life issues. Do the voters have the guts to throw out the liberal leadership that caused the problem or will the voters look to the Feds for another handout?
Lack of law and order was NYC's main problem, but detroits was that they were a one industry town and that industry went into permanent decline as imports and then automation gutted employment.
Searching out new industries that could use the cities then skilled workforce was the only answer, but again automaton was the check mate because no industry was needing many of those kind of workers. A massive half trillion dollar American high speed rail project is something that America needs and that would have saved Detroit, but America was never going to do it.
Bottom line, a functioning political system would have helped, but the problem would have been a difficult one. What the now black lead political system did was rabble rouse, do little of consequence on the problem, and drive the skilled and monied whites out of town further complicating the problem.
Now there is nothing to save. Detroit is a derelict mostly empty unneeded city in an area if the country the people dont generally want to live in, partly because the entire region is in decline. The only sensible action is to give it back to nature, 1 square mile at a time.