I submitted a proposal for the 2005 NEC to require GFCI protection for all
Residential Pool Pumps regardless (or irregardless?) of how they were connected. My reasoning was that many times these pumps are disconnected and reconnected (Season closings, openings & servicing, etc) by less than qualified people and sooner or later will become a hazard. It was shot down.
I've done quite a bit of service work on pools and did referral work from several companies. You'd be surprised what the Owner (or sometimes the 'Pool Guy') will do.
Don't get me started ....