I think the short answer to that is that you need to set the standard reasonably high. We're talking about public interest disclosures of wrongdoing. Certainly it should be broader than simply disciplinary action that could lead to termination. It should also include serious maladministration or defective administration, waste of public money, environmental risks, risks to public health, and all of those sorts of things.
Certainly our experience has been that it's a mistake to treat any and every breach of the public service code of conduct as a public interest disclosure. Doing that is basically an unmanageable step for a whole variety of reasons. In our federal jurisdiction, they made every breach of the Australian public service code of conduct potentially or automatically a public interest disclosure, and doing that was a mistake. The recommendations from the most recent review were to wind that back.
If there's a systemic problem with major breaches of codes or employment standards or processes, which would amount to some sort of breach of the law or an offence, and those become really serious, then those could be the subject of a public interest disclosure that triggers the whistle-blowing protection regime that we're talking about here. Certainly looking at every single potential breach simply confuses and overloads the systems. It's like using a sledgehammer to crack tiny nuts.