Detroit is un-fixable. Just let it die already.
The problem is that this is simply not true.
Many American cities have been on the brink of collapse and have come back. New York City is a shining example.
The New York of today is completely different than the New York of 1977.
New York wasn't based entirely around a dying industry. New York, even in its worst of times, had a lot of different things going for it. Detroit is missing that.
I'm not saying it's unfixable, but it won't be as easy as fixing NYC was....and MUCH less likely.