I see what you're saying, but at the same time, at what annual revenue level do humans actually start "chilling" more and work less? 500 thousand? I'd be curious to see statistics.
Where I live (Canadian city), a lot of parents are working less, through a variety of arrangements (stay-at-home mom, consulting, part-time work, parental leave). Some of them have pretty low incomes. Society doesn't make it exactly easy, but it's certainly possible, it's just not yet the mainstream option. Social safety nets obviously help.
Wikipedia has this nice chart: https://upload.wikimedia.org/wikipedia/commons/3/3b/Heures_t... . Some countries have seen impressive reductions.
Anyway, I definitely agree with that:
A solution that relies exclusively on choice fails the smell test.
Wealth inequality, etc...