Well, if you ask me, China already is capitalist. They started moving to a market economy quite a while ago, and these days its mostly the big industries that remain state-owned. What the Chinese realize is that there is definite advantage in a strong government presence, at least on the national level. Sure, there might not be quite as many millionares, but the nation as a whole is in a much better position due to the greater state control.
As for the "superior Asian work ethic", well what exactly is superior? Frankly, I think they're overly comptetiive, both at work and in school, though this is out of necessity. Sure, they can win out of other peoples, but at the cost of any sembelance of a happy life. The purpose of work is to provide means to happiness, it is not an end in itself. To sacrifice happiness for productivity is to starve yourself so you can have more money to buy food.