Just to throw it out there, when SAW was shut for three days the staff in turn took the time to go into the ride areas and clean (inside and out) as I recall going to the drop zone to clean around the rubble. The staff do clean as well as stand around. But you've got to consider when you see five people stood outside Stealth, there's at least three other members of staff doing something else. Same with Inferno, when there's two out the front, there's two more cleaning somewhere or sometimes even helping Engineering by putting bars down on cars or something. Until you've physically been there and done it you cannot punch at the staff, they do as requested of them. Bearing in mind you can say all you like about litter picking Fury's final turn, or cleaning Stealth's lake, the ride has to be locked off / the action has to be pre-passed by higher authority to do it for safety regulations.
(This is a post by SAWROB. Stealthowl just left his account logged in)