And this is one of the reasons why you see the revolving door between regulators and private companies. They are both competing for experts.
One can argue about the appearance of impropriety, but when people talk about stopping the revolving door, you’re talking about hurting both the gov’t and private companies because there are a limited number of experts.
For highly-technical regulators, this is definitely true — I’ve wondered what the threshold would be where it’d be cheaper to pay substantially more but with a non-compete banning work with anyone in a related field. There’s a plausible argument that the country would be better off with, say, a really motivated SEC even if you paid their retirees 50% to sit on the beach after they left government service.
One can argue about the appearance of impropriety, but when people talk about stopping the revolving door, you’re talking about hurting both the gov’t and private companies because there are a limited number of experts.