That presumes the managers can figure it out that they are costing more by sending the stuff overseas. Managers having that much intellect has yet to be proven
Yep, you live in the same world I do!
They won't even try until the Chief (whatever) Officers in the walnut suites review the bottom line of the Income Statement, after which they get yelled at by the shareholders.
Then the CYA flurry begins, and it may take a while to sort it all out.
How long corrective action takes after that is anyone's guess.