At the Commons communities and local government committee inquiry into localism, MP Clive Efford asked what proportion of income would need to be raised locally.
University of Birmingham emeritus professor of local government John Stewart responded that to achieve localism it has to be at least 50 per cent.
MP Simon Danczuk also asked whether constitutional change is required to achieve decentralisation. London School of Economics emeritus professor of government George Jones said: "There needs to be a degree of permanency in central-local relations."
