Despite all the resources the Tax Office has thrown into pursuing the 57,000 fraudsters behind the $2 billion Protego GST loss, the investigators have never worked out just whose fault this disaster movie was.

The auditor-general’s report delicately refers to “a lack of clarity” about who is accountable for GST fraud control and notes that “after two years of committee discussions this issue remains unresolved”. Others might call it a fog.