brit, it IS sustainable because they have modified it. People are making money, and live reasonably well. The better off they are, the less they care about "right" and "wrong".
A few are noble, like this dissident...and everybody sees what it gets them. There is still a lot of spying and informing going on. There.....
What counts in china at this time is money, they have suffered so much, now they want to life as well as possible.
And they are still quite indoctrinated,but don't mind because they are not suffering and their country is powerful now, alas, a big ego boost for them.