Robb review says no significant research was done before the deeply unpopular measures were introduced

Tony Abbott says the 2014 budget, which cost him the prime ministership, was the right way to go, and had been prepared according to normal procedures.
Tony Abbott says the 2014 budget, which cost him the prime ministership, was the right way to go, and had been prepared according to normal procedures. Photograph: Mike Bowers for the Guardian