What they neglected to say was you can always find "experts" on all sides of an issue. Politicians only need to pick the "experts" who give them the policies they want.
Of course, Progressive "experts" always give policies which grow and enhance the power of the bureaucracies.
In my career I had to deal with plenty of bureaucrats. I had a coworker who referred to many of them as “investment grade”. What he meant was that if you could buy them for what they were worth and then sell them for what they think they were worth, you could make a fortune.