Used to. Pensions are gone and wages have stangated for decades. Most anything above $20/hour puts it squarely in "the capex to automate this makes sense now" territory. And everything else gets farmed out to rotating temps so that any benefits that do exist can be advertised but are only rarely paid out. I've seen that play out a few times just among relatives (consider this a tacit response to your second paragraph, BTW).

More importantly, Foxconn's agreement with WI states that up to 93% of workers can be paid $15/hour. That's barely enough to live on even in Wisconsin.

If Foxconn were legally required to pay 50k+ with benefits for factory work, I would happily agree with you. But that's not what the contracts say. The contracts say basically everyone except management and engineering can be paid $15/hr.

Also, the Amazon fulfillment center just a few miles from the site of Foxconn's new plant pays $15/hour and is constantly hiring. So we're basically paying 4.1 billion for... a bunch of jobs that are roughly equivalent to openings that already go unfilled just down the street.

Finally, remember that we're talking about 4.1 billion dollars. That's a lot of healthcare/education/infra/small business development/etc. opportunity cost.