If you want something done right, then sometimes you have to do it yourself. But if what you want done is for someone to do your job for you, then that's kind of moot. Perhaps what you want to do is be mute, and let them do it for you. As long as they are doing it the way you want done, without you telling them how to do it, and for them to do it their own way, without you having to supervise them supervising.