Some of the departures have been as a result of sackings and the South Australian auditor general has since begun an investigation.
Britain's most senior auditor, who set up a judge-led review into the "sweetheart" multimillion-pound tax deals between HM Revenue & Customs (HMRC) and corporations, appeared to undermine the process before it began by telling the country's most senior tax official that the inquiry would find "nothing of substance".
PwC has been Tesco's auditor for over 30 years.
Murphy made her remarks as part of a motion to extend the remit of the Irish government's comptroller and auditor general to cover the IBRC, which is wholly owned by the state and is being wound down.
These auditor deliberations form the more forensic part of the backdrop to an election campaign which also features a venomous array of claims and counter claims about corruption, cronyism and covert "Islamisation" with, it often appears, everyone accusing everyone else of racial bias.
Labourers striking over poor terms and wages were also deported by a major contractor, Arabtec, earlier this year, while an annual report on the situation by the construction project's auditor PricewaterhouseCoopers, expected in September, has yet to be published.
"It's a crazy idea," says Nasko Stoikov, a trainee auditor in Sofia.
AWH's external auditor, Ian George, was also told on Wednesday morning he may become a person of interest in the inquiry after his evidence the day before.
Xenophon has also written to Australia's auditor general, Ian McPhee, calling for an investigation into the $42.25m spent by Australia in its failed 2022 World Cup bid.
The scale of the fraud could be 10 times higher than previously thought - at £50m rather than the £5m figure disclosed this week by Sir John Bourn, the comptroller and auditor general.
The state auditor recently identified "massive and persistent" problems in the system, including abuse of it – often by employers – and warned it "is not sustainable in the current context of public finances".
