I don't think it's a terrible idea. They're quite fond of dividing people up in this way, like, by different generalizations/binaries, with the assumption that the different groups will behave in different ways. The white collars will be psychopaths (or "cut-throat," to soften it); the blue collars will be simple and hardworking all American-types; and the no collars will be airy-fairy move to the beat of their own drums. At least, those would be the stereotypes. It'll be interesting to see how it actually works out but to be honest I can see myself getting pretty annoyed with the season. I'm not a fan of people who think they're slick because they wear a suit to work, if you catch my meaning. The Wall Street crowd, in other words.
As a no collar myself, I'll probably be rooting for that group, haha.
Though, noticeably absent is a Pink Collar group, i.e. people in the service industry. Is it just because they only wanted three groups, or is there another reason?