Well well, who didn't know this

The study, “Money and Happiness: Extended Evidence Against Satiation,” by Matt Killingsworth, a senior fellow at the Wharton School at the University of Pennsylvania, found that the more money individuals have, the more satisfied they are.

Source: https://www.theguardian.com/us-news/article/2024/jul/18/money-buys-happiness-study#:~:text=Money%20can%20buy%20you%20happiness%2C%20says%20study%20suggesting%20more%20is%20more,-Data%20shows%20happiness&text=This%20just%20in%3A%20money%20apparently,association%20between%20money%20and%20happiness.