Create a Senate committee! Get the Inspector General to do it! That’s how it’s typically done.
https://www.defense.gov/News/Releases/Release/Article/3967009/department-of-defense-completes-seventh-consecutive-department-wide-financial-s/#:~:text=Teams of independent public accountants,Department and its reporting entities.
Audits happen all the time. You just haven’t paid attention because you weren’t programmed to be mad yet.