Sometimes, like when there are competent people under him, the boss just wants to be kept in the loop. I work with a bunch of good people. We get things done and make things happen. If we didn't CC him he'd have no clue what we were up to and he'd be way behind real quick. Sometimes it takes a while to get something done and impatient people ask the boss, "What's taking so long?" He just doesn't want to look like an idiot and say, "Uhhhhhh....I have no idea what you're talking about." Makes him look incompetent. It isn't a matter of trust, it's just about CYA.