What I needed, more than anything, was to have enough.
I have come to a similar conclusion. My current income is sufficient for most of the month. I would like “a bit” more money — I have computed the amount to be about $ 50.00 — so that I do not need to be parsimonious during the last week of the month. However, that amount would probably not measuredly increase or decrease my amount of happiness.
My needs (food, shelter, clothing, etc.) and my wants (an occasional meal out, celebrating with friends, a few new-to-me books of poetry, and such) are satisfied. I can usually afford a few desires (a new camera, a faster computer, or whatever) if I budget well and save for these desired items.