Conservative minister says policy was "never all about saving money" but just six per cent of tenants have downsized.
Just 6% of tenants affected have moved but the measure is saving money.
Unless the system itself is reformed, the sick and disabled will fare no better under a new provider.
Thirteen Labour MPs, including Diane Abbott and Tom Watson, voted against George Osborne's new cap on welfare spending.
The Work and Pensions Secretary says the policy "is not about punishing people, it's about saying that the money we have is finite."
Self-conscious attempts by one government to constrain the hands of their successors rarely work.
Diane Abbott and other backbenchers refuse to join leadership in backing Osborne's measure.
Osborne has failed to design the cap in a way that will advance structural reforms to housing and wages.
Party's decision could lead to backbench rebellion.
What do they think happens when you cut off someone’s source of food, rent and heating for three months?