Agaricus
I think you need to study the easyJet scheme a little closer before you rubbish it so comprehensively. To my knowlege, the only 737 ratings you will get for £15K are simulator time only, with possibly a base training sortie. The easyJet scheme is to the end of line training, which I would imagine is a minimum of 20 sectors. Not only that, but the airline repays the £23k to you at £1000 a month (and that includes about £2k in bank interest) once you have successfully completed the course. As for bonds, I was under a bond for 3 years at Virgin - as are all new hires here. You may feel they are not legal, but I believe that the principle has been tested in court already.
You can study the details of the scheme here:
easyJet Type Rating Sponsorship Scheme