Op is implying that there's excess labor lying around that with moderate prices (say, what you make in fields like construction, electrical work, etc.,) would be picked up. This isn't the case, or they'd already be taking the jobs in those fields that are relatively in demand.

I agree that if you paid people as much as software engineers to work in a factory you would certainly see disruptions in the labor market. I don't know what the market clearing price would be for factory labor sufficient to meet the US demand, but I don't think it'll be pretty.