The commercial prowess of the big schools sets benchmarks and artificially increases supply by organising extremely large loans for any teenager with desire and intention. Loans, which are simply not available to anyone seeking any other career path. The conditions for an oversupply have to be created, and it would seem it has been done meticulously well within aviation. Within other industries, professionals have managed to keep salary trends positive because they have either directly or indirectly influenced the supply situation. Or maybe it's because the senior members of those professions didn't sell out by helping set up training/recruitment organisations which would end up being run entirely for the benefit of their employers with terrible consequences for their individual careers?