Many problems converged, like people living longer, and pensions having cost of living increases.
All pensions are based on invested funds growing, and taking inflation into account, flat wages over the last forty years, and the population decline in all the old industrial cities, that did not work out.
Then there was the shortfall in funding at the old numbers, which were way low. The shortfall is over a Trillion, and that would not cover the long term liabilities.
Like our current Baby Bust generation, a much smaller generation to pay for the oversized War Baby generation.
No one ever used Al Gore's Locked Box for retirement money, they spent it, and left an IOU. Then they sold Bonds to cover the ongoing pension costs.
I think they should just fold. Otherwise they have to work to extract money from the dying remains, and if the Bond Holders and Pension Funds want it, they should extract it.
The City owns very little, I am sure if they could sell the art in the Museum it would be long gone, with no records.
The city would not spend the money to foreclose on abandoned houses, so the land is owned by who knows who, and it would take an army of lawyers decades to sort it out, and they are very willing to try, as long as the money holds out.
There are no recoverable assets. Sales Tax, Property Tax, are the only income. The cost of collecting, and maintaining Police Protection of Tax Collectors, uses up the money collected.
It took fifty years to dig this hole, now it is self digging.
The neighborhoods are strange and dangerious places, and downtown is like a Zombie Movie after dark, filled with abandoned large buildings, inhabited by Evil Spirits.
Unlike other cities that redeveloped the core areas, and let the edges decay, Detroit is even decay. Flint is about the same, as are many of the Great Lakes old industrial towns. Clevland is 20% abandoned houses.
Coal, Iron Ore, Steel Mills, and Barge Traffic are not what they used to be.
So even if the Pensions and Bonds get wiped out, Detroit will still be there, festering, in a downward spiral.
Already it has been compared to Grand Theft Auto, and Silent Hill.
They live in abandoned places and come out at night to feed.