That's because when we kill all the pirates and are 100% globularly warmed, the elites will live in the Arctic Circle. It's the only place they will still be able to ski AND snorkle AND get ice for their drinks as they watch the rest of us drown in the rising water or broil in the sun.
I love how these doomsday vaults are for global peril... but they are locked! Pictures I've seen are of some pretty damned stout doors, too.