I don't know anyone who "defaulted" to working when they didn't have to. I do know several people who actively avoid explaining why they are working to people who don't have the choice to work or not.
[1] Some did of course and the contrast was super stark, why live your life antagonizing those less fortunate than you? It's a choice but I never felt it was a healthy one.
and a social environment. "belonging" is a very important human need.
If you're a curious person with average or better intelligence you'll never be bored.
> I discovered that his portfolio was worth more than $4M and I asked him why he was working at IBM if he was "rich". His answer was that he enjoyed working at IBM, you could just "spend" stock as you would lose out on future growth, and what would he do with his time if he wasn't working?
People keep all sorts of things to themselves unless asked and even when asked.