The global PwC tax leaks scandal has claimed its first government scalp with one of Australia’s most senior tax officials departing amid revelations by The Klaxon.

One of Australia’s most senior tax officials worked directly at PwC with at least two of the partners named in the consultancy giant’s tax leaks scandal.

The names of more than 50 PwC partners and staff who received or shared confidential Federal Government data in the tax leaks affair remain hidden.

A group of around 20 PwC partners are allegedly preparing to campaign the firm over a "lack of accountability" in tax leaks scandal.

Disgraced consultancy PwC is refusing to reveal the “terms of reference” — the instructions it set — for its secret internal investigation into its decade-long tax leaks affair.

An alleged mastermind of the PwC global tax leaks scam has quietly left a role overseeing a powerful Federal Government tax advisory committee run by the peak body of the Australian legal profession.