Should people who don’t work through drink, drugs or obesity have benefits cut?

Benefits could be cut for people who refuse treatment for drink, drugs or weight problems. That's the plan announced by David Cameron. People who cannot work because they are obese or have alcohol or drug addictions could have their sickness benefits cut if they refuse treatment. So will this help get people back to work or is this picking on the vulnerable? Stephen gets the views of former Conservative Minister and MP Edwina Currie, Patrick Mullholland from the union NIPSA and we took you calls