If we assume two things, that:
1) Raising American standards of living should be a primary goal of gov't policy, and that wage increases aren't the only way of achieving this.
2) That information is asymmetric, that not everyone knows the same facts and figures as everyone else.
Then a reasonable conclusion is that the price of food and consumer goods, in general, going down for well over a decade is in fact a direct benefit to Americans. The real, inflation-adjusted prices of goods going down and quality going up (quality has not gone down, that's utter nonsense) is clearly, we can all agree, a great benefit to Americans. Their standard of living is clearly increased by cheaper, higher quality products. It's also quite reasonable to say this is a direct result of international trade, few would argue this as it's pretty obvious that we have far more goods made abroad in China, Taiwan, Japan, Korea, and India than we did, say 30 years ago. So, to only mention that wages over the past 10 years has stagnated while ignoring the preciptious decline in goods prices is quite obviously only half the story (less, actually).
Now, part of international trade includes bottom-lining not just parts and goods overseas but labor too. We see this all the time with technical support and/or customer service in India/Philippines, and people complain and moan about it while simultaneously ignoring the fact that there's no way they could be open 24/7 if they didn't off-shore it. It's quite beneficial to consumers to be able to access services 24/7. In terms of parts, in the automotive business, due to Japan's more stringent emissions regulations, they trash automotive parts like transmissions after 60K-70K miles, and are able to resell them on the international market to the U.S. for deeply discounted prices we wouldn't be able to compete with here. This raises standards of living by itself, as getting a rebuilt transmission for $600 is better than the normal $1200 rate you'd find at a local shop. Stagnant wages may or may not be a direct result of international trade, it's tough to say since we've seen periods before in U.S. history where inflation-adjusted wages stagnated for a decade (not including the Great Depression). But on the other hand we've also seen worse employment numbers, not 80 years ago either, but just recently in 1980, well before international trade took significant hold and only a handful of years after trade with China finally began.
So people bitching and moaning about their personal experience with people losing their jobs to someone overseas like to focus only on what they see and not what objective reality shows; which is that there are multiple factors affecting standards of living over the past, say, 10 years and that stagnant wages over that small period of time are quite clearly over-shadowed by falling consumer prices, better quality goods and a flood of technological innovation and convenience that have undoubtedly raised standards of living during that same exact period. Focusing on the sob stories may be compelling but ultimately the alternative of overpaying for labor is worse. I mean, someone in this thread is telling people that a well-educated engineer is getting paid just $17/hr, quite clearly a total outlier and misnomer since the average engineer salary straight out of college is in the $50K-$80K range with benefits, something anyone can easily confirm with a Google search. So it really does no good to embellish.