system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Why can't each state run the voter rolls through the SSA death index database to get rid of the 'dead people who vote'?
gpt
(1) They should.

(2) The SSA death index isn't always 100% accurate (though it should be), and people get very upset if a single voter is denied access to the polls.  

Further, any attempt to clean up the poll books is met with accusations of deliberate voter suppression.  (Some of them might actually be attempts at voter repression, which complicates things even further.)  The result is that the poll books remain highly inaccurate (out of date).