A candidate who hadn't been nominated yet (Hilary) had "control of the party’s finances, strategy, and all the money raised" and was given power to "make final decisions on all the other staff" and that's still not enough for you?!
Because you want emails stating "I, Eric of the nominations, doth pledge fealty to thee, Clinton, on this day, one month prior to the nominating day, and for unofficial and cheaty-pants reasons!"
Well, let me tell you, if I put all my friends in staff positions, and am the defacto leader of the organization because I decide all spending, strategy, and fundraising, I won't need emails reminding me that I can do what I want at the organization where every fart gets approved by me before it squeaks and before even that squeak I had decided the dinner plan and the guts it would pass through as well, so I know how it will smell.