OK, watched the whole thing, and I have a somewhat devil's advocate thought:
Do these people really have it that bad? They're arguably better off than pretty much anyone in the lower class in history except for perhaps their parents' generation. They're most likely better off than the Mexicans who took their jobs (whose lives were most likely improved with the manufacturing jobs). If anything these people are extremely fortunate to have been born in the US.
Obviously globalization has made things worse for these families and others like them, but has it made the world overall a worse place? I don't think so.