The Productivity Commission says there's a need for a rethink on social housing assistance given by Government.
Commission chairman Murray Sherwin says the total package of housing assistance costs the taxpayer about three billion dollars a year.
He says that includes accommodation supplements to about 330,000 people to subsidise their rents in the private sector.
"I don't think we've got a very clear idea of what we're trying to achieve overall or how we would know we were being successful or unsuccessful for that matter and I think there's more work to be done to really work hard to make sure that we're getting best value out of that money."
Mr Sherwin says over time, state housing has shifted from addressing predominantly income issues, to addressing complex and multiple social issues.
Photo: NZ Herald