Is there someone that don't really need money. I don't think there is anyone. The made individuals, the billionaires still work to earn more money.
Consider a situation where you have a current bank balance of a million dollars and decide to stop working relying on the money for the rest of your life.
You will definitely have bills to pay, tax to settle and so on. In a twinkle of an eye, you see that the money is no more. What next, bankruptcy. Some don't even need to stop working before they go bankrupt. Mere reduction in their income is enough for them to go bankrupt.