As far as I know, usually yes. The surgeons will take an hour or two's nap and food break or whatever while someone else cycles in but for the most part they're actually standing there surgeoning the shit out of the patient.
At least, that's what I've been lead to believe from the stories I've read and heard of.

Correct, money is an indicator of how much debt is owed to the “owner” of the money. All other methods of payment such as gold or gems are simply part of a barter system.

Am I an idiot?

No that's Gru

You slept thirty seven kilograms

God damn it took me staring at this hint for two minutes to understand the post.

You’d be surprised at people’s sexual tastes.

That joke took three hours to get but I do appreciate it.