The Commonwealth Ombudsman has been compromised by infiltration of past CAsA employees. Now they would be the last avenue of redress. State Ombudsmen (or insert your gender specific here), are like the Banking and Legal Ombudspeople who are beholden to their Peers and providers. The AAT is the only avenue of redress, but one can't have a redress of wrongs until they have been wronged.
The end result is nobody has any protection from excesses from those controlling our "mantle of safety".
Beware the CAsA "own motion" investigation which gives them the opportunity to write their own terms of reference.