Quite often they are the result of sophisticated modern equipment that the pilot cannot operate because of its complexity. There is no correlation between what you can afford and what you can operate. Any pilot should be capable of avoiding CAS by the use of traditional techniques and Mk1 equipment and not have to rely on equipment that can fail.
I accept that, very much so, but I do wonder which is the bigger issue? Pilots not knowing where they are, or pilots flying "spaceships" but not knowing what the knobs do.
My own anecdotal experience is that the former is a far bigger issue than the latter, and I suspect NATS agree otherwise they would not have done the stunningly exceptional thing of backing that £150 GPS product - something which the CAA would have done over its dead body.
Of course the latter scenario is far more embarrassing
