It is not a bogus argument. You are forgetting the "hidden " labor costs in the US. If Levi pays a worker $20 an hour, it will actually cost Levi $35 an hour. Then there are all the other "hidden" costs - unemployment insurance, taxes, regulations, etc.
It's no different than the auto industry. A US auto worker costs $64 an hour, a Chinese auto worker costs $6 an hour. If you are in the business of building cars to make a profit - just where do you think your factory will be built?
It isn't rocket science.
So our gov't screws up our economy with over-regulation and taxes, and then turns around and helps those companies burdened by same move over seas. And the American worker? Heck, there's always the military.
Yeah? And how many pairs of jeans are made per hour?
Sounds like Mexico would be more to your liking.