This isn't true at all. China is one of the only places in the developed world where the populace legitimately could topple the government, simply by sheer mass.

Why do you think the party works so diligently to quell dissent and organization while going to extreme lengths to prop up the economy? It would be nearly impossible to hold on to power if the people turned, but nobody is interested in that while they (or their children) can live in a nice apartment and take a holiday in Europe once in a while.