I wish you all well in your efforts, but you try telling the 21yr old Joe Bloggs with £100K of his dads money that he shouldn't pay Oxford/ctc and easyJet to fly. Will he listen? They haven't yet!
..and therein is your problem, the root cause of the problem! No matter how much ctc/easy or anyone else charges to fly, you'll need to convince Joe Bloggs not to do it. Can you do that? He really does want to fly that shiny new jet you know, and tell all his friends he's an airline pilot.
Can you convince these people not to continue fanning the flames? Write to the papers but you should also be writing to the students in flight schools to make them understand how they are ruining the industry. easyJet and others don't care they're just looking at the £ signs.