I also really like this idea. It would also make it more reasonable for new players to survive in the starting areas, while providing a harder survival experience for those out west. It may even give people more incentive to farm and fish in the north west, if they choose not to travel all the way back east and deal with all the dangers that might entail.
I would also suggest medical and firefighter loot also be reversed, to provide even more of a diversity in loot spawns and rationale for higher geared players to head back to the starting cities.