@hawkeye10,
Quote:the root of the problem was people buying homes they could not afford,
An oversimplification.
The root of the problem goes back to period between 1970 and 1978 when Baby Boomers were entering the housing market. You remember the Baby Boom, the result of the biggest homecoming since Ulysses? What happens when more and more people chase limited goods? The price goes up. Home prices started rising around 1971 or so.
George Goodman, who wrote as Adam Smith, observed in his 1981 book
Paper Money that people were using houses as investments and not
simply as domicile.
That caused the price of homes to rise even faster. As the Boomers started families, they began to compete for space in those communities whose schools were recognized for their quality. Bidding wars went on and home prices soared.
Then the divorce boom came along and families were now living in two homes rather than a single house.
That loans were written for unqualified buyers was a consequence rather than a cause, but, even that is far and away too simple.