Q. RBR was continuously accused by other teams to break the RRA. Is this correct?

HM: No, because we abide by the agreement. We provided the consulting company that checked the situation with all data that we had to provide. However, they wanted to look further into details that were not part of the agreement and what we consequently refused. It is a fact that engine and KERS have to be counted separately. And how do you count people who work for gearbox and KERS of our customer Lotus (Caterham)? Who can say clearly who in Ferrari works for road car production or F1? How do you count the 400 staff at Mercedes performance engines?
Q & A with Red Bull's Helmut Marko - F1 news - AUTOSPORT.com

I read this as Helmut admitting that teams knowingly break the spirit of the rules by hiding costs in tertiary activities and within their partners. Some organisations would find this harder to accomplish such as McLaren and Ferrari where's others may have greater opportunity and scope.

This is building up to a bit of an issue within FOTA. McLaren are playing with a straight bat as they have a pretty transparent operation while others may be able to get away with more by hiding behind parent companies or partners / partner teams.

Formula 1 team principals are hopeful the RRA can be saved - F1 news - AUTOSPORT.com

It's claimed by Martin Whitmarsh that this is Sabre rattling by some teams but if it isn't fair and equitable for all teams, I can see this being a real threat to FOTA.