At least in google pay was more based on col than supply and demand. The reason was if not everyone would move to Mountain View and that was not good for the co

At least in google pay was more based on col than supply and demand. The reason was if not everyone would move to Mountain View and that was not good for the company. So in general offices in low col like India or Taiwan paid better than expected to try to have people stay. There were exceptions like London for some reason.