People relocate for different reasons. One of the main reasons is the salary increase and the perks. It is not that easy just moving "at a drop of a hat."

Because the economy is such in the West, or globally for that matter, the prospective employees will weigh out the advantages and disadvantages of making such a drastic move. The package will have to be lucrative enough to justify the move.

Now, for those prospective employees that want an adventure or want to make a drastic move for other reasons...then perhaps the employer will be able to hire them at a lower rate.

Regardless of the reason, it is expensive moving to another part of the world and the sacrifice has to be justified monetarily.