Overall levels of fraud are almost by definition hard to measure precisely. Demanding precision is simply a way to duck the issue. It's easier to precisely measure red teaming efforts, because then you know the denominator.

There is no incentive to run these programmes well and no downside to failing so you should assume fraud is rampant. When the GAO got a gas-powered alarm clock approved, who in the department lost their jobs? Did the head of the EPA get fired? Did they all lose their bonuses? No, they held a meeting where they claimed it didn't matter because the industry self-polices.