Frankly, they can do what they want with the structure of their side. Even if they came out and said they didn't want the Aussies to have a look at them, so what? They are just doing what they think will help them win the whole thing. These decisions are amplified because of the occasion, and the strategic side of things plays out more often in a WC which goes for so long and which has all sorts of subtle permutations, as opposed to a straight 2 way or 3 way series between different countries.
Surely their biggest concern was their effort with the bat vs Australia anyway.