World Bulletin / News Desk
"Too many people are stuck on sickness benefits because of issues that could be addressed but instead are not," he said in a statement.
"Some have drug or alcohol problems, but refuse treatment. In other cases, people have problems with their weight that could be addressed, but instead a life on benefits rather than work becomes the choice."
Britain's finance minister George Osborne has said he plans to make cuts of 12 billion pounds a year in welfare payments if the Conservatives are re-elected as part of a push to wipe out Britain's still wide budget deficit.
A group which seeks to help people lose weight said the plan would be a waste of money, given the complexities of analysing individuals' weight problems and checking up on their progress. Instead the government should focus on weight-gain prevention.
"Threatening people isn't the way forward," said Susannah Gilbert, a co-founder of Big Matters, an obesity support organisation. "We need to put in place a structure to help anybody who wants to lose weight and that just isn't there."