This could be the story of a year or so I spent on another team at my company. I joined a team as what I thought was supposed to be a junior member of the team and was (without any input from me) turned into a stange kind of sub-manager. I had no budget, no authority, my manager wouldn't back me up with anyone (on or off our team), and yet I had full responsibility for a very public element of our IT infrastructure. Despite all this, I got the job done, and I maintained some semblance of professionalism (though I was not, of course, at my "sunny best" doing it) and our internal customers were very happy, to boot. As soon as I could I high-tailed it out of there to another department, but not before I got reviewed (in part by the manager listed above). I was particularly amused by the part where I was "incapable of working outside the chain of command" - since I didn't *exist* on the chain of command, that was a logical impossibility.
Whew. Glad to read all I had was a reasonable response to an unreasonable situation.
Folks, this is serious. If you wouldn't want the job, how can you ask someone else to do it? If your best people (and they are the ones who usually end up in this kind of situation) say you're not giving them what they need to do their job (or else you're giving them more than they can handle with any level of help) who are you to argue? The reason you want them to do the work is because you trust them to get it done, isn't it? Well, why don't you trust their judgement about what they need to follow through?
Of course, the very people who need to read this won't. Oh, well.