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Big Four Accounting Giants
How a sleeper issue inside the big four could topple the economy.
Read MoreA whistleblower exposes the role of two accounting firms in a $300-million tax scandal
Tonight a whistleblower exposes the role of two accounting firms in a $300-million tax scandal. ABC Investigations reporter Adele Ferguson unpicks the business of financial auditing and uncovers serious questions about conflicts of interest.

ABC 7.30
Investigation · 14 Aug 2023
Tonight a whistleblower exposes the role of two accounting firms in a $300-million tax scandal. ABC Investigations reporter Adele Ferguson unpicks the business of financial auditing and uncovers serious questions about conflicts of interest.
The $300-million tax scandal at the centre of this investigation involved two of Australia's major accounting firms — firms that were simultaneously providing auditing services and tax advice to the same clients, creating conflicts of interest that regulators had long warned about.
The whistleblower who spoke to Ferguson described a culture within the firms where the commercial imperative to generate fees from multiple service lines overrode the professional obligation to maintain independence. Clients were being advised on tax structures that the firms' own auditors were then required to sign off on.
Ferguson's investigation drew on documents, interviews with the whistleblower, and analysis of the regulatory framework governing the auditing profession — finding that the oversight mechanisms were inadequate to detect or prevent the conflicts of interest that had allowed the scandal to develop.
A whistleblower described a culture where the commercial imperative to generate fees from multiple service lines overrode the professional obligation to maintain independence — with auditors signing off on tax structures they had helped design.
The investigation was part of a broader series of reporting on the big four accounting firms, examining how their dominance of both auditing and consulting had created systemic risks for the integrity of Australia's financial reporting system.
The broadcast prompted calls for the government to strengthen the separation between auditing and consulting services — a reform that had been recommended by regulators but not implemented.
A whistleblower from within the accounting sector approaches Adele Ferguson with evidence of conflicts of interest in a $300-million tax scandal.
The investigation airs, exposing the role of two accounting firms in the tax scandal and raising questions about conflicts of interest.
The broadcast prompts calls for stronger separation between auditing and consulting services.

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