To me this is the key point... > “building wealth to them is a creative process, and the closest thing they have to fun.” When you put a lot of your effort in

To me this is the key point... > “building wealth to them is a creative process, and the closest thing they have to fun.” When you put a lot of your effort into something, you become invested in it. It doesn't matter what it is. I'd suggest that past a certain point, the drive for greater material wealth is no longer about survival or comfort, but is instead about wealth as its own end goal. It's like grinding in an RPG, if you grind past a certain point the game itself becomes too easy, so the enjoyment changes to maxing out your stats just because you can.