Unlike so many industrial innovations, the revolving door was not developed in Detroit. It took its first spin in Philadelphia in 1888, the brainchild of Theophilus Van Kannel, the soon-to-be founder of the Van Kannel Revolving Door Company. Its purpose was twofold: to better insulate buildings from the cold and to allow greater numbers of people easier entry at any given time.
These mass foreclosures are a form of "ethnic cleansing". They want the people to leave so the developers can take over.
"Rich White Folk" do not want to live next door to poor black people so property prices in such Neighborhoods remain low. Buy the property for pennies on the dollar, get rid of the poor and there millions to be made.
Well, they don't get hurricanes like New Orleans. They had to figure out some other way to grab the land.
I do agree in this case about your "ethnic cleansing" remark, but it's hardly unique to Detroit. I lived in an Appalachian state where poverty was out of control, and property tax auctions happened on a regular basis. They happen everywhere, every day. To me, it's the war on the poor in general. Yes, there is a need for people to pay property taxes, but there is also a need — a responsibility — for a community to provide a viable economy to its citizens so they can work. But then, I'm a big ole socialist who believes in government working FOR the people, not trying to dispossess them.
The use of this tax foreclosure on a mass basis is clearly a land grab.