There's a name for that kind of thinking, but I can't recall what it is.

Essentially you're minimizing cost by paying the lowest possible local rate, but isn't it just as valid for someone else to maximize quality by paying a competitive rate for the most expensive locale? Presumably both would be pushed to a middle (location independent) wage because the company minimizing price will (presumably) have issues hiring all bottom-of-the barrel employees, while the company optimizing for quality will have issues paying top dollar when it only provides marginal gains over a high-average wage.