Westpac’s Michael Ullmer and Optus chairman John Arthur warned that corporate governance models cannot be successfully grafted onto partnerships.

In the wake of the KPMG audit leak scandal, executives from Macquarie, Westpac, Optus and Dexus cast doubt on their faith in the auditor.

Westpac’s Michael Ullmer and Optus chairman John Arthur warned that corporate governance models cannot be successfully grafted onto partnerships.