I presume there won't be an adjustment based on which specific city you're living in but more based on the general region. The Bay Area will likely have the same salary band all around regardless if you're in Oakland or Palo Alto. After all - once you do that then where is the line drawn? For instance, some areas of Palo Alto are much more expensive than others.

Maybe they should start scaling based on how much rent you have to pay. ;)