You're just a cog...
Usually if you start in a high cost of living area and move... you keep it.
The only time I have seen it drop is in IBM where if you were 'repatriated' back to your home country and worked locally, your salary was adjusted. Had a couple South African friends who were given the offer to go back to South Africa... they just laughed.
What most companies do is keep your salary the same, however when it came time for bonus or promotion your new salary bump was weighted against you.
Of course w IBM ... they tried to cull those who worked from home and outside of their 'office' as a way to cull older workers....
Biting the hand that feeds IT
