Anyone in a top team leader position knows that is is how the the top dog keeps their position.
They fear that someone under them is making them look weak so in front of the board meeting they cut them down by not passing on all the info prior to the meeting.
This is exactly what turnbull is doing to Morrison, more scared of his own position looking weak than to have a strong team behind him.
All the previous news of Morrison being the next in line for PM is being slowly eroded by Turnbull.
Keep your rivals at arms length they all say.
