Look lets first establish the fact that those that have pointed out that the problems lie in that Detroit's government is a corrupt group of people that care more about taking the money out of the city and giving it their friends in patronage jobs then trying to fix anything are spot on. As long as those corrupt people are in charge this is just an academic exercise because the things that would start to bring back the city are diametrically the opposite of what is ideal for a corrupt politician.
In other words, Detroit is a microcosm of any organized polity that has a government at its head.
All governments are ruled by "a corrupt group of people that care more about taking the money out of [the polity they govern]". The point is to learn how to work within those confines to maximum effect, even if, nine times out of ten, doing so requires establishing institutions which run parallel with the official State.
I absolutely agree with you here. One thing to take into consideration is that demolition projects cost money; you can't simply go in with a bulldozer and begin shellacking houses left and right, certainly not under the present regulatory regime. I'd have no problem with the city purchasing abandoned houses and selling them at far below market value.
And this is where we depart. Instituting a law-and-order regime on the model of New Orleans is not only not going to salvage the local economy, it's going to depress the backbone of the community - which, like it or not, has got to be the local African-American community - even further. New Orleans did not 'boom' when Bratton was in office; quite the opposite, it underwent one of the longest periods of recession in Louisiana's history. And a lot of it had to do with the basic fact that public police corruption tends to undermine faith in local institutions.
It's not going to be what you want to hear, but it's going to be what you
need to hear: Detroit's population has got to find their own salvation, so to speak. I cannot fathom for the life of me why we ought to oppose urban farming schemes, for instance, particularly if it means we can reduce Federal food subsidies that much further. Importing police chiefs who have a long and storied history of corruption in order to make the town 'feel' safer for outsiders is precisely the opposite of what needs to be done - decentralize, deregulate and desubsidize must be the order of the day.