The relevant stakeholders are elected, or nominated or hired by elected officials. And as already pointed out in a sibling answer, there kind of is such an offi

The relevant stakeholders are elected, or nominated or hired by elected officials. And as already pointed out in a sibling answer, there kind of is such an office already in some sense. The core of the problem is that if you try to introduce an extra layer of bureaucratic oversight, one might expect an outcry over it being technocratic or wasteful. So it's unfortunately not simple. (However much your viewpoint makes sense IMHO.)