Large companies routinely rely on private audits to prove that their food is safe even though private auditors are dangerously incompetent, according to a New York Times investigation. The private auditor who inspected the Peanut Corporation of America plant responsible for unleashing the massive salmonella contamination was trained to audit bakeries and repeatedly gave the plant a “SUPERIOR” rating, partly because he “never thought that [salmonella] would survive in the peanut butter type environment.”