The admission by the CEO of Australia Post that four executives had been given Cartier watches as a reward for a banking deal sparked a wave of indignation and damaging headlines. Politicians on both sides of the spectrum were quick to condemn the purchases and laid the blame at the feet of the beleaguered CEO, Christine Holgate. Within hours, Ms Holgate was gone but the scandal was far from over. On Monday, Four Corners investigates the turmoil inside Australia Post and what brought down its high-profile CEO.