与其浪费口舌争吵，不如读点美国学者的研究，美国的阶级有没有？

1. "The rich" coalesce into a social upper class that has developed institutions by which the children of its members are socialized into an upper-class worldview, and newly wealthy people are assimilated.
by G. William Domhoff
2. Members of this upper class control corporations, which have been the primary mechanisms for generating and holding wealth in the United States for upwards of 150 years now.

3. There exists a network of nonprofit organizations through which members of the upper class and hired corporate leaders not yet in the upper class shape policy debates in the United States.

4. Members of the upper class, with the help of their high-level employees in profit and nonprofit institutions, are able to dominate the federal government in Washington.

5. The rich, and corporate leaders, nonetheless claim 
Working people have less power than in many other democratic countries.

by Prof. G. William Domhoff

in his book, Who Rules America,