So chip production does have a labor cost, but the equipment used is quite pricey, and so the relative cost of labor is less. Also, given how pricey the equipment and how demanding the cleanroom protocol (which, if not followed, reduces yield of saleable products), there are a lot of incentives to make sure you have long-term employees who are well trained and motivated to keep their job.

Also, Austin (and other parts of Texas) already have a fair number of chip fabs, and have for decades. I used to work in some of them. Samsung even has existing fab capacity in Texas. So it's not such a new thing.