Seriously think about that you have said.
We don't have a magical time machine to prove nor disprove what people have written or said on the subject.
I have seen a well written documentary that says what you are suggesting the riots of 1989 bought about 2 choices. (Sorry I can't find the link at the moment). One the political door, or door 2 the economical door.
http://www.pbs.org/wgbh/pages/frontline/video/flv/generic.html?s=frol02p7b
Part 4, first 5 minutes
The unwritten deal the documentary says you can be wealthy however you will have to put up with our rules. Door 1 and you will have to fight us all the way. The ones who are getting the better end of the deal are kind of people who protested at the riots.
Another reason or part reason is that in the Gulf wars, the Chinese military saw the USA fight against the Iraqi army. The Iraqi army was using a lot of Chinese technology. Seeing that how quickly the USA and there technology overcame the Iraqi forces, the Chinese government saw that it needed to "upgrade itself" and modernise itself fearing that a USA-China confrontation will come one day.
http://www.cnn.com/2003/WORLD/asiapcf/east/03/24/willy.column/
As for for the Chinese having the best interests that is debatable, who is growing richer the people. The change has bought about raw capitalism which is unregulated, and has led to a series of scandals, growing environmental problems etc....
The government knows that one day they will have to give up, being nice to the people when its needed only slows down the process.
But think... There the reforms that made China as it is today
1979 decollectivization:- state run farms, targets are abolish allowing people to work freely on there land and production has increase.
Post-1989 Government introduces business plans in which, they give tax breaks to foreign businessm change laws to make China more open in which has lead the way for more money to flow through its treasury by
a) Selling its goods on a foreign market.
b) Getting foreign companies to invest its money in China.
The above have one thing in common they let the Chinese business person run there business with better freedom than before and with a bigger market now. Its rather clever in that way, most of its investment for modernisation has come from foreign sources and not the government helping its people directly.
However modernisation is not always right for everyone as shown in the later half of this youtude clip.
http://www.youtube.com/watch?v=jR5e4XJ-ll0
Is he right, would they be better working a 9-5 job in an office building?