How confidential tax information was shared at PwC

afr.com:

At least six former PwC Australia partners including international tax chief Peter Collins were involved in leaking confidential information from Treasury, the Tax Office and the Board of Taxation to colleagues and clients, legal reports prepared for the big four firm have concluded.

A document drawn from reports into the tax leaks scandal by law firms King & Wood Mallesons and Allens, and Linklaters, which outlines PwC’s version of events, details how Mr Collins triggered the tax leaks scandal. Mr Collins shared the confidential tax information with PwC personnel who then used it to help clients sidestep Multinational Anti Avoidance Laws he was helping Treasury develop.

From left, and top to bottom, Tom Seymour, Peter Collins, Paul McNab, Michael Bersten and Pete Calleja  

However, the document takes a broader view of the firm, and reports breaches of confidence across at least five different sets of government consultations, involving former partners Paul McNab, Michael Bersten, Pete Calleja and three unnamed partners.

The document, published on Wednesday, also states that in December 2013 former CEO Tom Seymour, who was then head of tax at PwC, was forwarded emails from Mr Collins and Mr Bersten about their engagement in a Treasury advisory group, which included copies of Treasury acknowledgements of the confidentiality agreements the two had signed. Mr Calleja was also a member of the Treasury consultation group and signed a confidentiality agreement.

During 2014 and 2015, Mr Bersten (on one occasion), Mr Calleja (on two occasions) and Mr Collins (on several occasions) forwarded OECD documents to other partners who had not signed confidentiality agreements, according to the report.

However, the disclosures were not