What country are you talking about? In India I don't know but in China the living costs are skyrocketing and are in many occasions more expensive than in major western cities. 2 for 1 (if the team lives in a big city) or at most 4 for 1 is what I believe would be the upper bound.

Well if you truly talk about "third world country" then sure, 10 for 1 but what kind of country and IT operation would that be?