The 40-60% increase in fees this year is to support the InfoSource program. More than that I don't know. As a sidenote, AMCAS completely sucks compared to AADSAS (if you can believe that). My cousin applied to 19 schools last year using AMCAS, and only 2 schools ever received his application. He is currently suing AMCAS.
Because you will enjoy a better life than most future primary care physicians who will apparently continue to be dumped on by Medicare, Medicaid, and Insurance Companies. I guess it is a case of pay Karma now or pay Karma later.