this analysis is ludicrous.  if you live in Hawaii and you $100 is worth only $85, there is really nothing you can do.  can one go to missisippi and buy food there and ship it to Hawaii?  can someone buy house missmissippi  and ship it to Hawaii.  obviously not.  your $100 in Hawaii buy $100 worth of good and services in Hawaii.   if you want to live in Hawaii, then you grin and bear it.  if not, then go to somewhere else where your dollar goes further.