Comment by rcxdude

Well, the question was "How much does your annual salary need to be for you to feel happy/less stressed?". So it's a relative position: how much more money to subjectively improve your life? In that sense it makes sense, given the general diminishing returns of the utility of money, that those with a higher salary would say they need more additional money to be happier: even if they're relatively happy already, it's not something a relatively smaller amount of money is going to change much.

I find the inflection in the percentages somewhat interesting: it reduces from the lower to higher incomes until about 150k, then increases a lot. I wonder if that represents the salary range where financial independence starts to come into sight: then the responses there would be reflecting an estimate of the amount of money they'd need to retire early and live their current lifestyle off their savings.