TheRev, I think you misunderstand the point of the programme in one respect, (which HM pointed out to you) which is that, where lack of CAS exists for the service required, aircraft HAVE to go off-airways. It is not a matter of airlines "saving a few bucks". Without the use of advisory routes, of Class G airspace or whatever, there simply would not be a service. Lots of controllers and pilots would then be out of jobs, lots of the travelling public would be unable to fly from the regional airport of their choice.
This is simple economics.
It is not acceptable for the military to indulge themselves in "it's legal, so we can do it" behaviour, and it's not acceptable for the 172 driver to hang around on the extended centreline of a military runway.
It has to be accepted that we need to share airspace responsibly. We also need airspace that works for all of its users. What we have at present does not meet that criterion.