Loughla is right, it was reasonable for customers to trust their banks on scoping a mortgage. Not because of some technical fiduciary status, but because banks had a history of being conservative with mortgage underwriting, and because it would seem to be in the banks' best interest to be conservative with mortgage underwriting.
But some banks thought they could lower their underwriting standards and get away with it because they could shift the risk to larger financial entities by selling the mortgages. And a lot of non-banks got in on the mortgage underwriting game for the same reason.
And bank customers liked it. Who doesn't like to be told that you're in better financial shape than you thought? That should be good news.
My point above was not to defend what banks did, but to point out that, even though banks were in the legal right to lower their underwriting standards, it did not work out well for them or their customers (or anyone else, really). And a lot of the downside came later, in the form of bad reputations, burdensome regulations, etc.
Most buyers didn’t get mortgages from their retail bank, they got them through mortgage brokers.
Maybe there were lots of hapless old people who were misled by some bank they mistakenly trusted for years.
I don’t think so, the many examples I personally knew from that period were getting loans from specialized banks that set up mortgage shops, like Washington Mutual.
The book (and movie) The Big Short digs into this how regular people were overextending.
To clarify, the banks were bad actors by offering and participating. But reasonable people were avoiding the situation until the whole system tipped over. Someone borrowing at 40% debt to income or higher should never have done that, even if they trusted their local banker who was saying it was fine. Finance requires personal responsibility and people need education to help make these decisions (and they shouldn’t get this help from someone with a vested adversarial financial interest).
But some banks thought they could lower their underwriting standards and get away with it because they could shift the risk to larger financial entities by selling the mortgages. And a lot of non-banks got in on the mortgage underwriting game for the same reason.
And bank customers liked it. Who doesn't like to be told that you're in better financial shape than you thought? That should be good news.
My point above was not to defend what banks did, but to point out that, even though banks were in the legal right to lower their underwriting standards, it did not work out well for them or their customers (or anyone else, really). And a lot of the downside came later, in the form of bad reputations, burdensome regulations, etc.