I'm not sure the same market forces do apply. Medicine and engineering are "gated" by the academic nature of the courses, and I stand to be corrected but I think in the UK at least the prospective legal Beagle has been funding large portions of their initial training for some time.
I hate to say it but like it or not the academic qualifications required to enrol for your ATPL course are fairly minimal, therefore there's an over supply of suitably qualified students right from the get go.