I assume the worry is they'll do what J. Edgar Hoover did and amass secret dossiers they can use for blackmail (or to tip off the press to get rid of) their political opponents.
Even if the president himself is a saint with nothing to hide or blackmail him over, he has many friends and allies.
With that said, any control would have to be limited enough that those controlled went along with it instead of fighting it - a relationship of complete puppetry would be difficult, as they might decide to go down and take you with them.
Even if the president himself is a saint with nothing to hide or blackmail him over, he has many friends and allies.
With that said, any control would have to be limited enough that those controlled went along with it instead of fighting it - a relationship of complete puppetry would be difficult, as they might decide to go down and take you with them.