Taking views of some well-known cartoonists, and several who have left their newspaper employment, Cavna tallies the opinions and offers advice to editors: "A top-notch political cartoonist is worth at least as much a star sports columnist. On balance, in fact, they can be strikingly similar."
He explains it at:
http://voices.washingtonpost.com/comic-riffs/2008/11/
the_rant_just_how_much_is_a_po.html