I think our 19th-century-style schools are the problem: we drum information and behaviours into kids until they forget how to be independent. All this time wasted sitting at a desk in a classroom means they might miss out on the chance to develop a passion for something, something that they would fill their free time with later in life. And then we're surprised that people just want to watch netflix.
https://www.ted.com/talks/ken_robinson_says_schools_kill_cre...
No amount of time spent with friends is "really unproductive", it literally keeps us alive. I didn't see a note about it in this article, but I suspect that the no-income people that are happier with their lives are doing low cost entertainment activities with friends.
The implication of the statement "Humans absolutely need jobs in order to lead happy, beneficial lives" is that humans are, by their very nature, to stupid to figure out how to do it by themselves.
I very strongly believe it's a cultural problem, not a human problem.
The problem is that people don't know how to use their free time, and so it ends up spent getting high and watching TV. Maybe people would be better at exploiting the time they have if they were allowed free time earlier in life. Kids are pretty good at taking advantage of the time they have, maybe if they were allowed to keep more freedom through to adulthood they'd keep the skill. Maybe if our non-free time weren't so stressful we wouldn't feel the need to use our free time just to unwind. Or maybe its that entertainment has gotten too compelling. I'd rather not believe that people have an innate need to be forced to do whatever they do.