These people who say they don’t need money are those who never had any problems because they always had good money. If they knew how hard life could be without money they aren’t going to be saying such things. Life is a lot easier with money even if it does not guarantee you happiness at least that is one problem away from you.
Only people who are super rich say things like that because those people never think about how difficult it is to live when there is no money. In fact, I very often see more problems that can be solved with money in order to gain happiness because happy people are definitely people who already have money and don't have many problems in their lives. But someone who doesn't have money will definitely find it difficult to find greater and longer happiness, even though that person is always grateful for what he or she currently has.
So I tend to think realistically and logically when it comes to money because every person who works in this world must be as a result of his dedication to earning money and being happy in his life. So I always ignore that money can't buy happiness, because in fact there are many people who suffer in this world when they don't have money in their lives.