A PwC partner leaked government tax plans to his colleagues to help their clients avoid the new rules.
I will resolve this market yes if in 2023 any partner who was not involved in the scandal leaves the firm, citing the scandal as the reason.
This article gives a summary of the scandal:
https://www.abc.net.au/news/2023-05-23/pwc-in-the-firing-line-as-afp-gets-involved/102376954
This seems very close.
"CBD is reliably informed that Grant told acting chief executive Kristin Stubbins several weeks ago that it was in his own and the firm’s best interests for a fresh set of eyes to be looking out for the accounting giant’s rep."
Leaving in January and didn't explicitly site the scandal:
https://www.afr.com/companies/professional-services/pwc-tax-ace-the-first-to-jump-ship-20230809-p5dv3g