His dead body was present at meetings in this preserved form. He was "present but not voting". Sounds like the same idea as the dead John Locke returning to the island for some unknown reason.
Oh, now that really makes sense. I was having trouble understanding what Bentham's ideas had to do with John. Though he wasn't as bad as Jack, John could still be a bit of a dictator at times whereas Bentham was very liberal. But that auto icon thing is something they definitely have in common. Very funny on the part of the writers.