Cyrano,
If the punters want a cheapskate fare then they relocate, or take their holidays, somewhere on a mad Irishman's route network.
If they choose to live and/or fly from/to a quaint Cornish seaside village then they need to appreciate that they need to pay an appropriate airfare .... Operators such as Scot Airways seem to make such a living from lesser sized aircraft operations, Manx2 also!
With current fuel & VAT prices what does it cost to operate a car, probably circa 35p per mile, NQY/EXT/NQY 88 miles in each diection but let's say 66 miles in each direction for the average NQY punter, that'll be £46 in car expenses to/from EXT, not that they can readily fly the world from EXT, so if the airfares from/to NQY were a mere £45 higher than EXT then the punters are getting a bargain!