It isn't a matter of laziness, it is a matter of SCOPE. I don't ask ground personnel, ramp, mechanics et al to perform in flight or f/a duties, nor should a f/a perform duties outside the SCOPE of their profession. F/as should not be "plucking" tickets, hauling bags, nor cleaning aircraft. When I arrive at my "office", to begin my "shift", all components should be in place.
I remember walking onto a 1011 one early morning (the plane had been at the gate all night). It was filthy and the ramp cleaners tried to pull the team work card. What often starts off as "make nice", "I'll help out this time", too often becomes expected procedure. Jobs are cut, the product suffers and the customers get the raw end of the deal.
In management meetings I asked where the decision had come to cut the cleaners. We went around the room (all depts were present) and it was discovered that the suggestion had come from ENGINEERING. Now no offense to engineers, BUT I can't think of a mind set less concerned about customer ammenities than an engineer..lol Sometimes these decisions are made without seeing the impact on the entire system.