It's an old quote I first heard as applied to the music business, however the original quote is as follows and comes from "Generation of Swine: Tales of Shame and Degradation in the '80s," published by Summit Books in 1988.
"The TV business is uglier than most things. It is normally perceived as some kind of cruel and shallow money trench through the heart of the journalism industry, a long plastic hallway where thieves and pimps run free and good men die like dogs, for no good reason." - Hunter S. Thompson
Somewhere along the way this quote has also had this tag line added to it, "There is also a negative side." Admittedly, funny but not written by Hunter Thompson.