Describe them as a "Poster Child for the Peter Principle".
[Describe them as a “Poster Child for the Peter Principle”.]
Pretty good argument.
Until you consider the folks that you’re trying to persuade: Members of Congress.
JMHO, those turkeys make the Peter Principle look tame. They not only have risen PAST their level of incompetence, but have also mastered the art of making everything they touch turn to sh**.