Well, there are some other factors in play here.
We're inching closer and closer to moving a significant portion of manufacturing back to the US. 3D printing is some serious shit, especially when it gets into every home.
There are a few other technologies that will eliminate manual labor jobs. Even in IM - automation eliminates so many tasks that would otherwise be done manually, even the skilled stuff - like PPC management, for example, can be done very efficiently by scripts and AI.
Jobs, as we know them today, are an endangered species heading towards extinction.
What will that mean for the US as a nation? No idea. What does need to happen, is that a lot of people are going to need to shift into creative or scientific fields in order to survive in a nation running on machine automation.