US is unique in this sense because when we lose our job, we lose our health insurance, risking financial ruin. This forces us to go above and beyond so to not end up in that bottom 10% that gets regularly laid off. We overcompensate not to have a great life, but to not be completely broke.
This makes us easy marks for work abuse, this is why we respond to emails and Slack messages at 9PM, this is why we are afraid to leave at 5PM to be with our loved ones, even though we are totally spent to do any effective work (or do shit work at that point).
What we call quiet quitting may be just snapping back to what work should be, after the COVID lockdowns made people realize they were wage slaves.