This is pretty interesting...
For those who don't want to watch a video:
Landlord raises rent a lot, regardless of whether anyone is willing to pay (i.e. above true market value).
High rent is used to claim a (fake) high value for the building, despite it sitting empty.
High value for the building is used as collatoral for a bank loan.
Bank loan is used to make other investments.
Other investments apparently make enough profit to compensate for loan interest AND lost rental income, because the latter is a tax write off.
Result: landlord and bank win, community and taxpayer lose. And if the economy as a whole falters, the whole thing collapses.