I don't remember where this is from, but it was quoted by
Steve Laudig on Club Orlov.
From Douglas Adams [the other Addams family]
"It comes from a very ancient democracy, you see..."
"You mean, it comes from a world of lizards?"
"No," said Ford, ..."nothing so simple. Nothing anything like to straightforward. On its world, the people are people. The leaders are lizards. The people hate the lizards and the lizards rule the people."
"Odd," said Arthur, "I thought you said it was a democracy."
"I did," said ford. "It is."
"So," said Arthur, ... "why don't the people get rid of the lizards?"
"It honestly doesn't occur to them," said Ford. "They've all got the vote, so they all pretty much assume that the government they've voted in more or less approximates to the government they want."
"You mean they actually vote for the lizards?"
"Oh yes," said Ford ... "of course."
"But," said Arthur, ..."why?"
"Because if they didn't vote for a lizard," said Ford, "the wrong lizard might get in."