Ann Arbor also has a boatload of students looking for any kind of work they can get, and townies who will take any kind of work they can get just to live in Ann Arbor.
It's been that way for, well, forever.
The higher pay of Washtenaw county is why I landed here snuggled up against the county line. Much cheaper living in Jackson county and working in better paying Washtenaw. Funny thing is that they whine about us taking money out of their county but can’t connect their taxpayer funded salaries to the taxes we pay.
In my experience, the college kids won’t work the factory jobs. Those are mostly taken up by Jackson and Lenewee county people.