It gets better: it appears Medibank Private don't actually know if data was stolen or not. They know someone got into their system but they no idea what they did.
However the hackers are threatening to release the medical data of 1000 prominent Australians so I image the authorities will actually put some effort into doing something as opposed to the situation with the 10,000,000 plebs whose data was stolen from Optus.
"Now Sir, if you wouldn't mind filling in this form with all your personal, medical and financial details we'll ensure that, in due course, it's published on the internet."
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"I beseech you in the bowels of Christ think it possible you may be mistaken"
Oliver Cromwell, 3rd August 1650 - in a letter to the General Assembly of the Kirk of Scotland