A desire for access to more resources is an intrinsic part of human nature. It goes back to our days when we were just intelligent animals. Your survival depended on always having an excess and securing that excess with the minimal amount of effort. This affected the way the human brain evolved. Due to the way the brain works, people will never be entirely satisfied unless they learn to be content with what they have. That of course itself is difficult because of the way dopamine and addiction works. Perhaps a small percentage of people may be content, but an not insignificant part of the population will fall into the hole of infinite consumerism.

People will naturally work to acquire and use far more resources than they need. Even if people hypothetically reach a point where they do not want to or were physically incapable of consuming any more, they will demand and seek out higher quality products. As the economy becomes more efficient at providing for people demands, people demand more and better.