Just to add to that, it is okay to ask the Auditor General to look into a given topic. Doing that will carry more weight if the group is unanimous in requesting it.
Auditors general often get requests from political parties to look at particular things, and my understanding is that they take all requests they receive seriously, but they do have a great commitment to ensuring that the audits are non-partisan and evidence-based. Ultimately, it's incredibly important for the independence of the Office of the Auditor General that it have the ultimate say in setting out its audit plans.