What you forget is most of poor people have crab mentality, they don't want to see other people succeed. Also, they don't have a good understanding about money, even they get a lot of money, they will end up become poor again.
Even in middle class there are still crab mentality, most people are kind and willing to help you until you're in the same level with them, but if they know you're better than them, they will become one of your enemies.