X-pendables:Talented singers are being sacrificed to keep show controversial, claims X Factor's Matt Cardle

By LIZ THOMAS and JAYA NARAINHead to head: Contestant Matt Cardle says judge Simon Cowell backed controversial Katie Waissel over Aiden Grimshaw because she is better for the show's ratingsX Factor favourite Matt Cardle has accused Simon Cowell of treating talented finalists as ‘expendable’ in an attempt to keep viewing figures high. The aspiring singer claimed Cowell saved controversial Katie