In Nigeria, yes, most rich people will always say they don't have enough, and they'll use this excuse not to give, even though it's obvious they have a lot. A few of my maternal uncles were like this. I think it's the idea that they don't have enough, or they feel they worked too hard for it.

I think when people have money, it'll eventually show in the things they do, except for rich people who keeps their money and don't use it to improve the quality of their lives and that of their children