The 2013 Melbourne Festival of Ideas had a session on obesity with a spirited panel discussion laying out all the arguments from all the protagonists.
Full session: http://www.youtube.com/watch?v=-JiVTHAhKlQ
Radio National First Bite (edited version): http://www.abc.net.au/radionational/programs/rnfirstbite/are-we-eating-ourselves-to-death3f/5076592