If I went back into education for 2 more years, piled more student debt on top of myself, not to mention living like a student again, PLUS having to have a part-time job while studying (while the loan is bigger for a PGCE, the costs of living are much much higher), and then got a job as a teacher, worked my ass off for 10 years, I would, if I was lucky, be earning the same salary I am today, a couple of years after leaving university.
Sounds like a great fucking deal to me.