Sort of a corollary to #2... When I am engaged to work with a client, all of their people you need involved tend to show up when you need them. Sure, I represent a specific expense that no one wants to be seen as wasting, but it can be more that. The seniority level of the people is high as well, so you know if you need a decision made, the decision maker is in the room, no one has to go off to get that decision from someone else.
I am not saying this is fair or anything, it's just the way it is, so I enjoy it as it comes.