If that hypothetical alien civilization 10,000 light years away developed radio technology 12,000 years ago and moved past the technology 11,000 years ago, the last alien broadcasts would have moved past the Earth in the early 1900's. They would have swept right past us without us knowing at all.

That's a bit shortsighted.

Gadgets are not something like food; their novelty/luxury items. If (when) the cost goes up across the board, people will spend less of their hard-earned money on the things they don't need - ie, gadgets. (Perceived) quality will need to go up a similar proportion as the increase in cost for the product to remain competitive (remember the 'high quality' Erickson, etc. cell phones from a decade ago? - they were supplanted by other products offering a better price value).

In return for the decreased demand, there will be less manufacturing done; this will further increase the manufacturing cost per unit, likely leading to a loss of jobs in the foreign plants (unless they're able to cut costs). Increasing costs to your customers NEVER results in more business unless it is paired with a (perceived) equitable increase in the product.

As for respecting China's culture... sure, I'll get right on that. My first cultural taboo to learn to respect is child labor. After I've gotten over that, I'll work on violent persecution of belief systems I don't agree with (Christianity, Islam, etc.). Then I'll work on agreeing with overt state-controlled censorship, and finally, the wanton destruction of the ecosystem and disregard for dumping toxic waste. In fact, I might start on the toxic waste thing: it's easy, because all I'll have to do is pour some waste oil into the municipal sewer. I figure that by this time next year, I'll have matured enough as a person to start accepting China's particular brand of threats and imperialist encroachment - just in time for their wholesale invasion of Taiwan or Tibet, maybe.