Bilderberger
A contract is a contract and pilots are not forced to sign, although, as No Joke intimates, no bond; no job. However distateful that may be to him, companies are not obliged to offer him a position just because he wants one and if the bond situation is quite untenable, then he should look elsewhere. The company's sandpit; the company's rules.
The determination of the the cost of the training is not up to the pilot or an independent TRTO but, if it is reckoned to be too much, the employing company would have to justify the amount and, if it is an innaccurate figure as you suggest, would probably be found to have been unreasonable and would therefore lose any action. Responsible employers already incorporate a breakdown of training costs into the contract and if they don't or won't, avoid them.
Congratulations asecretidentity on maintaining your integrity.