Management gets locality pay because that is what it takes to get quality candidates to live there. Pilots don't because they will take the job at a 16k/yr salary and suffer outrageous work rules hoping to go to the majors.

My 2 observations. 1 - No one is forced into the aviation career field. 2 - Companies won't give their employees more money than they have to out of the goodness of their heart, unless that is the business of the company (i.e. Goodwill, etc).