‘Crack down on welfare rorters. Get tough on radical Islam.’ If there’s a whiteboard in the Prime Minister’s office (or his much-maligned Chief of Staff’s), and those words or some version of them aren’t scribbled in caps with a bevy of arrows pointing to them, they should be. Cynics see the loud blasting of the twin barrels of national security and welfare reform as a sign of desperation – a frantic move by a panicked prime minister to stave off an inevitable Turnbull challenge.