This is just a bit of a question really, but why do writers always seem to go from company to company.
I'll use Morrison for example, he went from DC/Vertigo to Marvel for a time to do New X-Men, then returned to DC...and now I have no idea what he's doing aside for hiding in his Loony cave writing Multiversity....or something.
Same with writers for non comics: Greg Weisman went from Disney with Gargoyles to...whoever did W.I.T.C.H, to Sony (?) for Spectacular Spiderman to Cartoon Network/Warner for Young Justice and now is back at Disney for Rebels, all while also doing individual episodes for shows like The Batman, Brave and the Bold, Transformers Prime, Ben 10 and Legion of Superheroes
Paul Dini also went from Warner/DC/Whatever to DC proper, to Marvel to work on Ultimate Spiderman, yet also worked on Arkham City and that Tower Prep thing that Cartoon Network had.
Is their a limit of how many times a writer can do this? This isn't even going into how many writers do work for two companies, like Gail Simone for example with Red Sonja, Batgirl and The Movement.