Which might well happen, but the Western world isn't going quietly - the West has already started strategically introducing McDonald's, Pepsi, and reality TV into China in an attempt to stem off growth.
So what? I could care less. For me it does not matter if I buy my wares from the guy down the street or from somebody across the globe. Why should I prefer one over the other? Why discriminate?
And not just there, but all the other emerging economies that are trying to industrialize. They would all have to follow the same system. South East Asia, Africa, South America etc.
Now I'm not saying that the income of workers in China is not going to rise - I'm saying that at the moment, there is a big difference, and that gives them a competitive advantage. In china you typically have 3 or more people serving you at one table when you go to a restaurant. That would not be possible in the west because of the high labour cost - in China it's possible because of the wage difference between what is being earned in the restaurant and what the workers earn.
Controlling your economy and only buying local goods is not a good idea in my opinion, but when there are new manufacturing processes being used in emerging countries, then you have to be aware of this.
I don't believe in protectionism at all, so that's not the point I'm trying to convey.
I would argue that the government has to play a role in controlling population flow and income, its very very scary if you give the same resources to 1 billion people and let them lose, if it works great, but if it fails, well that will be an epic fail.
Already in this economic crisis there is rumors of potential civilian riots due to loss of jobs, we're talking about the maybe less then 50 million (5% of population) rural workers who may lose their jobs due to closing factories. Imagine if the government gave incentives for just 10% more of the rural population to move to the cities - this effect would be multiplied many times.
(Of course if you care about the plight of the Chinese people than the black box simile is of no use. But it's adequate for an analysis of China's influence on the western economies.)