A new TV show

I was watching racist people on TV last week - aka Survivor Cook Islands (if you are not familiar with this latest Survivor, the 'tribes' are split into ethnic groups - Asian, Black, Hispanic, White) and it got me thinking about developing my own reality show.
I had a few ideas swirling around in my brain, but the idea finally came together while I was watching fat people on TV last night - aka The Biggest Loser.

CANNIBAL ISLAND
30 fat people are stranded in Papua New Guinea. No food, no animals, a few cannibal natives and of course a TV crew who enjoy a buffet lunch every day. The fat people are split between obese and super obese and sleep standing up lest they stop breathing in their sleep.
As the days go by, their sole task is to stay fat as the person who loses the most weight is voted off. They spend most of their days lying around like beached whales.
But here's the twist.
After the torch extinguishing, the rest of the survivors gather round, lasso the banished one and cook him/her rotisserrie style while the natives give them cooking tips. Every morsel of human flesh is eaten. The contestants fight for the fatiest meat as they don't want to be cooked next.
This continues until only one person is left. He/She is then given the reward. Not a million dollars, but a lifetime membership into the PNGCS - better known as The Papua New Guinea Cannibal Society which promises a lifetime of human meat for free!

I'm sure the networks will jump at the opportunity to broadcast such groundbreaking TV. Can you imagine the spin-offs? Cannibal Island - The Wedding where the guests are eaten, Cannibal Island - The Bachelor where the unsuccessful/ugly contestants are roasted? I can see loads of potential, can't you?