Semiconductor fab's are largely automated, so labor costs tend to be less of a consideration when choosing where to build a fab. The real problem is finding capable engineers who have the expertise and education needed to develop new lithography processes. TSMC and China are killing the US when it comes to attracting top-tier electrical engineering talent.
Mehh.. you need an Army of technicians to run a fab. A lot of them can be automated, but you still need guys to fix tools, test waste so you don't poison the water (at least in the United States), and people to deliver and remove product and necessity. All very well paying jobs, I might add.
Litho and other R&D for tools (I say tools to mean machines that process wafers, litho, dice, pick and pull, etc.) that is all still mostly US or European based. They may employ good foreign engineers, but they get them here to the US as an incentive or because they'd prefer to work here.
I think we use the word "capable" to pull the ladder up for young people. Working at Intel and other Fabs, I've seen an incredibly OLD workforce that will be retiring soon, but also they really aren't interested (or too egotistical) to find replacements (Intel's cultures is absolutely crazy too, eventually everyone but a hardened few snap and quit).
Reality is, I didn't get an Engineering degree and I can hang with the best EEs from anywhere(Hell, most of the bad engineers I work with didn't go to college). What I do is not hard, and it pays super well (If you can fix a computer, you can fix a Litho tool).
It's all about breaking through the "needs experience." Now that I have experience, I can work for whoever I want, for whatever I want. Before I had 3 years experience, I was treated as a 3rd grade educated moron. I'm not special, I'm just lucky. I would trade a lot of my previous coworkers for Fast Food employees in a heart beat