This is one of the most absurd tropes in capitalist societies where you literally need money just to exist. No only that, but money literally buys happiness because you can pay other people money to do things you don’t want to do, and that frees your time to spend on things you enjoy doing.
Clearly having too much money doesn’t buy happiness, but having enough money to live comfortably does. It’s also important to account for inflation and other cost of living increases when considering household income.