There's a simple way around this.
What about contract labor? Â Here at Motorola, we have contractual agreements with Chinese companies who build our products. Â They're even getting into designing our products. Â These companies are not US- corporations, thus cannot be regulated by any US lawmaking body. Â So, great, Motorola has to pay the people in their Tanjin factory a minimum amount, but the contract manufaturers can still pay their people a quarter an hour. Â All that's going to do is cost more people (in this case, Chinese people) their jobs, as more work will go to the contract manufacturer.
Does the point really get across?
You're right. Â There's always a loophole. Â I'd bet the contractor would not charge Motorola "cost" for manufacturing labor, though it would still be cheaper, no doubt. Â This is why I mentioned "nexus" laws that perhaps penalize foreign corporations with substantial U.S. source income for not paying fair wages. Â Again, something like this would work best if most of the "industrialized" nations agreed to pass similar laws.