Greed is what makes people poor. We always want something more thats why we are never contented with what we have. We dont learn to appreciate the little things. If people only learn to embrace the importance of being contented then i think this world will be better in terms of economy.
Greed at all levels does not just happen to the poor. Because everyone wants to give themselves the benefits and material wealth. No one denies them and if there are also very few indexes. But most of the game is the same, also to comply with the rules of the game. Be constructive, then develop more than before.