"Not everything we do well as individuals or as a nation is worth doing." I can think of a lot of people that would strongly disagree with this statement with all their hearts, are they wrong for that I don't think so. While I will agree that specialization and trade are great processes that add wealth to those involved, it easy for us to forget the costs of this process.
Roberts speaks of decreasing number of workers in Agriculture and manufacturing that frees up capital for ipods and other glorious things. While this is entirely true, it is easy to forget about the displaced workers when writing like this. Maybe they are know open to so many great opportunities that the otherwise wouldn't have had but that doesn't mean they are better off. It is easy to say from the tops of our ivory economic towers that somebody that lost there job can go out and find a new trade or job and make a better living then before but is it that simple?
While I may sound cynical, put yourself in their shoes. What if you were a worker whose skill was no longer needed with no formal education and you have kids at home to feed. When you are on the other side of the economic process, it might be hard to see how losing your job to an oversea company benefits yourself or your family. If you were in that position wouldn't you complain too?