IMHO chosen as Cliffords man to take on the unions and change the workplace forever. (see Cliffords roll at Rio)
Hence the big pay rise as the stock price has plunged.
He will go once the dust (for want of a stronger word) settles (before or just after the next AGM) and phase 2 kicks in.
Of course there will be a huge multi million dollar parachute with him......again (see Dixon's roll at Qantas)