Numerous warnings were given about Robodebt and his shower insisted it was all legal and moral - it took a decision in the High Court to ORDER the government to cease and desist on the basis, I believe it was the Justices of the Court that said "... it is nothing more than a State sponsored extortion racket...." (or words to that effect).
That didn't happen. What happened was even more morally egregious.
The Federal Court (not High Court) action was settled without the Commonwealth admitting liability. That's so that the government could claim - and of course has claimed - that no court has found the extortion racket to be unlawful.
A few of the victims had earlier taken the Commonwealth to the AAT, and the Commonwealth would capitulate before any adverse finding. There were plenty of warnings from the AAT, but of course the AAT is not a court...