The wealthy. You ask that like there is another answer. They will either buy and sell it for a profit or buy and rent it to people or buy it and stay.
Lol, I was just trying to be optimistic. It's a damned shame that they will not invest when working people are there, but they almost engineer and at a bare minimum, facilitate these cities' fall into ruin, just so they can snap up everything in a fire sale. I'm not saying there wasn't political and financial mismanagement, but there is in many jurisdictions, and they aren't placed into receivership like this. Orange County's muni bonds were among the first to be declared bogus as they went belly up, but they didn't put it on the auctioning block.