Being the sole income for a family, and having moved past the $100k/yr mark, I will disagree with that conclusion. I do agree that there are diminishing returns, and that does grow the higher you go. But, having the ability to just say “fuck it” and pay for something rather than constantly struggling, shuffling bills around or having to figure out what to cut this month makes life better. Sure, it’s not going to magically fix all your problems. But it makes it a damned sight easier to work on those other problems, when you’re not constantly stressed about money.