The author makes the classic error of bringing the economics textbook to the real world: with no location based pay, surely some of that chunk of money the market assigns to wages will be spread to the underpaid people in other places?

In the real world company A tries to squeeze wages in one place and company B obviously tries to hire at local wages in the other place. There is no built-in fairness, it's just a negotiation strategy. The new equilibrium could be that everyone earns less.

I'd rather have that employees around the world can take home a western salary if possible, putting that money into the local economy and raise salary expectations among their peers.