Why would you want to be productive all of the time? Best way to live is to be as only productive as necessary while being as comfortable as possible.
Work to live, not live to work. Take the vacations, but live in the same house you’ve owned for years, and keep your cars for 10-20 years.
Speaking of allocation, we’re already fully employed. White-collar labor in the US is just badly allocated, with some people working 50 hr per week, others zero. Changing the max downwards could well fix this.
Idleness is only bad if people who don’t WANT to be idle are idle. And before someone starts yammering about how Americans WANT to only have a week off per year, the same argument was used to support slavery in the 1860s. “But they wouldn’t know what to do with their freedom, they WANT to work for a benevolent master.” Riiiiight.