Work forces change over time, we've reached that point where the industrial sector goes into decline. (That's normal IMHO, we're not 3rd world anymore.) We are moving into a new, service oriented economy where we sell our smarts rather than our brawn. That's not such a bad thing, but it does tend to leave folks behind as manufacturing moves to more raw labor freindly countries. Such is life.
The problem with moving all manufacturing off shore is that over time you lose the technological skill sets to innovate in basic research and to create new and better products to manufacture.
In a simple example, how many new plumbing fixtures are created by plumbers (the guys in the service industry) and how many are created by the manufacturers. Since the plumber isn't creating products, he doesn't need to do research on better metals, better finishes, etc... That will all move offshore to the manufacturer who needs such things.
In another vein, most medical device innovations come from manufacturers. In some cases a Doctor (the service industry guy) will think up a new idea, but the doc doesn't know how to take an idea from inception to market. Without a base of technological people to draw from, a new startup can't be formed and the new product can't be brought to market.
Manufacturing is about a whole lot more than raw labor.