Highly regarded new Tax Commissioner Rob Heferen put in a polished, no-nonsense debut at Senate Estimates last month, later assuring his 20,000-odd staff in an in-house video not to be put off by unfair media coverage, singling out what he called the “kerfuffle” with the Tax Practitioners Board.

That would be the collective noun for ATO senior management, then: we say a parliament of owls, an unkindness of ravens, now a kerfuffle of senior tax officers.