Wise wealthy people who’ve studied history understand the concepts you nicely summarise in this article. Unfortunately, many (perhaps most) wealthy people are foolish and uneducated, and thus we as a society keep repeating the same mistakes as soon as the disastrous results of the last go-round start passing out of living memory.
I wish I could share your optimism about everyone “shoulder[ing] one another’s burdens, grabbing our bags and bugging in to the places were our neighbors need us,” but it’s already happening with “the Big Sort” in a less salubrious way.