In a vacuum perhaps but that depends on the credibility of them actually leaving and for there to be new jobs coming into a sector. Manufacturing in particular isn't great because any new company is already going to be looking for lower wages just to compete against imported products manufactured overseas.

A small difference in wages won't attract people from far away to move to a new location because of all the thing I originally stated and ultimately while there are some good benefits to manufacturing in the US it's hard to beat Mexico or China because the costs are so much lower there for labor. On top of that because it's a relatively low skill field the potential hiring pool is very large so there's little need to pull in veteran higher wage (and higher healthcare cost) employees from other companies.