Fleet Ensign

The Fleet Ensign is a rank dreamed up by the admirals of Starfleet to keep the Redshirts from refusing to go on missions. The rewards of promotion to this rank were listed as "Your own shuttle parking space, being able to boss around ensigns, single officer quarters(In reality a small closet), and the ability to choose a color other than red to wear."
To date no one has ever been given this rank as no Redshirt has ever survived his first mission.