Nevada and Voter ID

I don't have much problem with phasing in voter ID requirements, as long as it recognizes the problems of the elderly (and others).  I'm struck by this paragraph in a Politico story:

"One state, Nevada, is proposing a different kind of voter ID law — one that would cull photos from the DMV and state databases rather than making voters bring their IDs to the polls. If a voter doesn’t have a photo in the database, they would be photographed at the polling station.

Read more: http://www.politico.com/story/2013/01/voter-id-battle-set-to-rage-again-86080.html#ixzz2Hmgw08u0

Makes sense to me.  If the bureaucracy already has a photo associated to a name, why not put the burden on the bureaucracy instead of the citizen.