In July last year Centrelink rolled out a new automated income matching system for detecting and recovering debts. It became known as "Robodebt" and was designed to help the Department of Human Services collect $4.5 million in debt every day. In that sense, it was super efficient. Too efficient, even.

The Commonwealth Ombudsman has just released a detailed report into the failings of the OCI - calling the system "poorly planned, deficient and unclear", confirming up to 20 per cent (possibly $3,075,503 worth) of demands to repay debt were incorrectly issued.