Probably, perhaps, maybe.
A sort of bulk deal the Commonwealth does. They/we (Australia) carry a fairly substantial insurance bill. I would look at the Budget to see how they have offset what must be a huge bill. CASA is probaly mixed in with the high risk jobs, war, flood, fammine and peeing in the corner cover.
There is probably a discount for a 'bundle' of general insurance costs.
There are no hidden costs in the CASA budget.
The background music - "Oh, it's called 'Believe it if you like', same old band; just a jazzed up standard with different front man; yes dear. the fat one with the cigar".
CASA Integrity Survey.