As they say on Wait, Wait, Don’t Tell Me, “and now for some quotes from this week’s news.”
Over the entire history of human finance, the underlying premise of all credit transactions — loans, mortgages, and all debt instrument — has been the borrower’s ability to repay.
Except for [the 5 year period from 2002 to 2007] the entire history of human finance was rather reasonable about the basis for making loans in general, and extending mortgage loans in particular.
For 99.9996% of the last 1.2 million years, loans were granted primarily on the condition of whether or not the lender believed that the borrower could repay. Between 2002 and 2007 this condition was dropped.