"Alright, show idea here!"
"What is it? Sitcom?"
"Better! Think about this.. We get about ten random people, then we promise them a million dollars.."
"Then we shove them into some place where they can't leave or they lose.."
"Then we make them all play degrading games and the losers get kicked out!"
"That's great! We should also get some real asshole's on the show so they start fights and cause drama!"
"Ahh! Genius! We could also get some junk from the basement and call it the "immunity item" or something, everybody will be fighting for it! Haha!
"Everybody will watch it, they will give us awards!"
"Haha, what dumb-asses!"
They won't be showing that on any Survivor DVD commentaries, but I assure you that's how it was created. After a successful run of the show (once it ends) the creators will be leaning back in jewel encrusted chairs smoking in their pipes thinking about how many people they humiliated and how much they made profiting from it.