But if you give a man earning 0.1X dollars X, you can make a huge and long-lasting impact on the man's happiness, because he didn't have enough money before and

But if you give a man earning 0.1X dollars X, you can make a huge and long-lasting impact on the man's happiness, because he didn't have enough money before and now he does. Money doesn't buy happiness directly; it buys security, and security enables happiness.