Whats happening to the Lack of Contenders In the WWE?

There isn't a lack of contenders it's just that Vince Mac doesn't use a variety of wrestlers. He preferes to stick to his main guns: Orton, HHH, Cena, Batista, Taker, Edge ...which really sucks. There are a lot of guys with potential to make it BIG in the WWE including: Shelton Benjamin, Mr Kennedy, Carlito, Kofi Kingston & Elijah Burke. However, they get treated like dirt and aren't given many opportunities.