There's lots of demand for protest in China, protest just happens to be among the few illegal acts successfully suppressed in China.
The two countries are absolutely incomparable on these particular points. Prosperity alone does not quell protests, most protests in the U.S. are decidedly bourgeois.
The U.S. is a massive country. You tell me: what class are people who can afford to take time off work, and pay to travel to other cities to complain about society?
