Trains, planes or automobiles, health, education or indigenous care, welfare or childcare, the young or the old, the fast or the creative, an NBN or hospital beds – how should politicians decide where our taxes should go?

With the election looming and promises flying from all sides of politics, the indomitable Sally Warhaft is joined by special guests Kristina Keneally and John Hewson for a robust perusal of the public purse.