Plus explicit contracts in new housing developments barring current sales and future sales to specific "undesirable" demographics. This "red-lining" was widespread from post-WW2 boom through the 80s or so to keep those demographics out of some areas. Those demographics were locked out of the housing markets and in big urban areas like NYC this created an artificial demand for rental that forced these people to pay above-market rental rates for substandard housing, a double-slam on generational wealth accumulation.

This is why we aught to never have subcidies or bailouts.

Perhaps, but at this point that means pulling the rope ladder up behind you so no one else can use it.

No.

There is no perfect system. That doesn't mean you don't implement systems. You just police them better to make sure that kind of problem doesn't happen any more.

Hard to find problems with a system that doesn't exist, so perhaps some "systems" are perfect.

Systems, like functional code, can seem perfect in isolation. Everything is accounted for and it's provable. Beautiful!

Applied to any useful purpose, though, there are externalities and there is the unexpected. If you include those externalities in your model, you not only have a more complicated model, but you probably have an even larger surface of externalities.