Exactly SARS.
During these heavy checks, it is the only time you have access to certain structural inspections. This is the only opportunity in the aircraft's maintenance program to inspect and repair corrosion, cracking, wear etc etc, for example, floor areas below galleys and lavs - immediately spring to mind. It is very simple to pen off these inspections and reinstall equipment and furnishings. The MRO gets your plane out on time and charges you the 'advertised' rate and management look great because they maintained costs.
What scares me is the stuff that has not been looked at and will not not be looked at for a very long time. In the meantime the rot gets worse.
If you stood in front of two garages which advertised brake and suspension checks - one garage charges $129 and full report and the other charges $49 flat fee, no more to pay - what might one sensibly presume? Obviously not the same line of thought as the current Engineering management.
Wonder where, D Cox and any of his motley crew who have a car provided to them, get their car serviced? The cheap joint at Hurstville, because they have the Company and the cost, foremost in mind - think not, their cars are serviced and repaired at the dealership because they know that the facilities, spares, expertise etc etc are better provided. But a jumbo - well that's another story, eh.