The best answer I can give Roffa is to repeat that it is not GA that needs the CAS but the airlines and if they wish to have a very large volume of airspace (for which they have paid nothing) then surely it should be incumbent on them to provide the necessary infrastructure to allow others to use that airspace when safe so to do and I would also venture that not enough controllers should not be a "safety" issue. NATS or whoever want the airspace to satisfy their fee paying airlines who will simply add any additional costs on to their fee paying passengers whereas the majority of GA does not have that luxury. So I say again it is not GA that needs the airspace it is the airlines so why should GA pay for the "privilidge" of being able to transit through a chunk of airspace that someone claims as their "own" and have paid nothing for it?