Federal government can audit and wiretap citizens, citizens should be able to audit and wiretap the Federal government.
Personal privacy aside, how are secrets imperative to national security protected if you allow full audits by any American citizen?
Musk is roughly as democratically elected as the average IRS bureaucrat (arguably more so, since the guy auditing you most certainly never appeared on the campaign trail), so I view it as a wash.
It's currently being passed around Lagos on zip drives as we speak, and has been for years.