As another commenter noted, what’s happened so far is that the quality of life has improved for so many Chinese that they seem willing to accept this system despite its problems. This may indicate American foreign policy was wrong-headed, but it’s still too early to tell. A middle class represents a large power base, and especially as second generation middle class Chinese come to adulthood, they may no longer see this model of government as acceptable. But: who knows? Nobody has a crystal ball.