In spite of being corrupted, why has Mayor Quimby from The Simpsons not been replaced from the position of mayor yet. We have seen him taking bribes from Fat Tony, again some theft from tax money. So what is the reason that he is still the mayor of Springfield?
I know that he is largely just supposed to be funny, like many other characters that still have their jobs despite their incompetence (e.g. Chief Wiggum, Dr. Nick, Otto, ...). But apart from this, has it ever been adressed inside the show itself why Springfield fails to either recognize Quimby's inappropriateness for the job or do anything against it? Or is this left entirely unadressed as part of the joke around his character?