Senator GALLAGHER (Australian Capital Territory—Manager of Opposition Business in the Senate) (14:04): Justice Murphy also said that the harm and flaws in Mr Morrison's illegal robodebt scheme 'should have been obvious, should have been plain' and that ministers and senior public servants 'should have known'. How did the Morrison government keep this massive failure of public administration, which is estimated to cost taxpayers an overall $4 billion, going for so long?