Pain Monster

The Pain Monster is a monster hired by Richard Nixon to spend a weekend with any Earthican that chooses not to pay their taxes. Considering his name, it can be assumed this weekend wouldn't be very pleasant for the non tax-payers.

Quotes
Pain Monster: See you April 15th folks!
 * Richard Nixon: My fellow Earthicans, we enjoy so much freedom, it's almost sickening. We're free to choose which hand our sex-monitoring chip is implanted in. And if we don't want to pay our taxes, why, we're free to spend a weekend with the Pain Monster!