I'm not sure if there's any economic system that could survive long term without people being productive. Just because the farm is collectivized doesn't mean you aren't working from the crack of dawn to sunset

Being productive doesn’t require you to be productive non-stop. It’s not good for you and will likely make you far less productive in the long run

Trivia on farming: Medieval peasants worked far less than modern employees (at most 150 days a year). It was obviously harder physical work than sitting in an office all day, but they had plenty of downtime

Medieval peasants also had life expectancy of 30 years, what’s your point?

How’s that in any way related to the topic?

That is not true. You are passing on an ill informed myth.