riser :
We will always have this as long as we have a capitalist economy. Look around the world - our poor have better lives than most people.
Lockdown answered the rest, so I want to focus on this part.
You've said something really important. I don't know how many OWS people share my opinion, but I think we need to move beyond capitalism. It is better than the economic systems that came before. It also has a lot of problems, the greatest of which I think are the suffering it creates at the bottom, and the dignity it steals from every level. It also happens to exploit those "most people" "around the world." It bothers me that my privilege depends in part on the exploitation of people in unimaginable poverty.
As for the argument that our lives are better because of capitalism, the same argument could be made for slavery. At the time, slaveowners were making the argument that since they owned their slaves, while the northerners rented them, they were forced to treat them better.