It can last for a surprising amount of time, if a third party provides sufficient subsidy, a tolerable payment plan, and in the end agrees to eat much of the co

It can last for a surprising amount of time, if a third party provides sufficient subsidy, a tolerable payment plan, and in the end agrees to eat much of the cost nominally borne by the borrower. I forget which economist said it: "unsustainable things can go on for far longer than you'd expect, but then they stop far faster than you might anticipate."