Is poverty necessary?

I think poverty is necessary because even rich people need poor people. For example a business man needs a cook to cook for him and that cook needs a baker that baker needs someone else. The system works like that everybody needs each other. But when you look for another window being poor is not satisfying. Nobody wants to be poor. Some work hard and try to go on their lifes but some people doesn't do that. They sit their backs and they only will about something. People who doesn't work can't succeed in their lifes. But we must understand something. Life is not all about money. There are friends we have and we must not forget about them.