Its amusing to see slaves defend the slave system.
You work, another profits. The rich are not richer because of them working harder or any other such virture. It is leverage. They leverage capital. They also leverage the labor of peons whom they have convinced to work for less.
Now as for capital being leveraged to earn more, damned straight, the more you have the more you can make no denying that. However the idea that the united states is merely a caste system where the poor are destined to remain and the rich are guaranteed individualy their control ad nauseum is truly foolish as well.
Only in America can an immigrant arrive off of a boat with nothing but the clothes on his back and be part of the middle/upper middle class through hard work in less than 20 years. Or move from lower to upper classes in a single lifetime. You may not like the system, and it has its flaws, but please don't try to characterize it as the devil it is not.