Apparently there are some quite material things not included in the Fed’s internal audits.
http://www.campaignforliberty.org/audit-fed/
They're material from a policy point of view but not financially or operationally. We know where every penny comes from and where it goes.
These aren't the kinds of things audits examine, and we don't demand to see the internal deliberations of the SCOTUS or transcripts of all the meetings that take place in Trump's, McConnell's or Pelosi's offices.
This is purely to eliminate the independence of the Fed and put monetary policy directly into the hands of politicians.
Politicians aren't economists and generally know nothing about central banking. What they do know is how to use government spending and policy to buy votes.
If people want to be honest and have a discussion about eliminating the Fed's independence, fine, but as long as they hide behind the "audit" canard I'll call them crackpots.