Meet my FIL, who recently moved in with us. If we'd had the whole situation he wouldn't be here. He earned 300k minimum for the past 20 years, had a trophy wife that was 15 years younger that did a great job of helping him spend it (and he was JUST as bad), she divorced him last year, he's pretty much broke, 72, and has a large assortment of creditors coming after him due to six figure debt levels.
They should have been WAY rich, and all of the kids thought he was fine/comfortable, until he ended up living in an extended stay hotel that he was getting evicted from.