Sounds to me like your sheriff might be doing a good job and the system might be working. Now if you had a sheriff that were a real problem and still couldn't get voted out, then you'd have an example of a broken system.
>>darker+(OP)
Most sheriffs in USA are unopposed. Even if they do a bad job, you don't really have a choice in the vote.
Its not really a system I'm a fan of. The voting population only can pay attention to so many issues, we should have our representatives pick (and hold accountable) more positions.