It is evident that you have a greatly restricted notion of human aspiration. Which was explained aptly enough by a psychologist called
Maslow's Hierachy of Needs in the early 1940s. It depicts well how we are motivated to move from top-to-bottom, regardless of birthplace:
Those below the Poverty Threshold, and they are close to 50 million in the US, are concerned primarily with the first two rungs on the triangle. They have very little desire for "
self-actualization" beyond nourishment and a roof over their heads.
This is the bit "programmed genetically" along with procreation. It is instinctual in our species.
And in your tidy, well-organized but Tiny World, all that matters is what you have been able to "earn" - and therefore "what is yours". And, in perfect simplicity, "What is mine is mine, and what is yours is yours. Don't bother me with the sharing claptrap."