What's the right size of the state?

Big and progressive, or big and wasteful? Small and innovative, or small and useless? PM debates the size of the state with Robert Peston, our economics editor, Ann Pettifor, Director of Prime Economics and one of the seven high profile economic advisers to the Labour party appointed by Jeremy Corbyn, and Andrew Haldenby, director of Reform, a think tank on the centre right that focuses on public services.