The exchange rate of the Yuan is tied with the dollar (a convertion box), and right now is 8 Yuan per dollar. The rouble is 27 per dollar. Anyway, that is not the important thing: the question is what you can BUY for that money. The russian and chinese engineers are not cheap because of the exchange rate, but because their salaries, the resources, the energy, everything that makes a cost matrix, is cheap. And, unfortunately, you can't beat that with more flights. You have to keep the technology over the envelope to mantain the superiority and to have investors. Right now the US is the only country with advances in the private spaceflight industry: that gives you a captive market. However, as soon as the russians or the chinese develop a cheaper way to send tourist to space, game over. The only way to keep yourself alive is to provide better services: they can put a man in suborbit cheaper than you, then you make an orbital vehicle. When they get to that, you offer circumlunar flights, and so on. NASA is the real thing for any american space program, and they'll keep advancing the envelope, letting local private industries to make profit with it. Definetely, you are right when you say that killing NASA is killing the goose of the golden eggs.