I accept that view.
But could you give reasons as to why?
China, for capitalists, is doing better than most!
Rich people moving out is not what is 'brain drain' as someone has commented!
Being capitalists, China only makes people rich, but fails to make the life easy for people. Whether you are rich or poor, the pressure is still intense. Everything is tranforming so fast, everyone is afraid to be left behind. I guess living in a country like USA where everything seems to have settled down could be much comfortable.
Plus, in the aspect of education, medical service, food safety, environment, etc, America is doing much much better than China,all of these make moving to America a good choice.
And I almost forget, Democracy, I believe that is the answer you are waiting for. However, my understanding on this is few Chinese move to America for the right to vote. In fact democracy is just the desert for Chinese, a better life in America is the main course.