With the autopilot in, there is no need to scan as in 99% of the time the aeroplane does it for you.
You hope. You still have to scan to ensure George is behaving himself. I know of various accidents where he went subtly AWOL and no-one realised until it was too late; or they did and then tried to solve the problem using the very same rogue who'd put them in the hole in the first place.