Do you mean pay or do you mean a bond?
If it were a paid conversion then what guarantee would the applicant have that, having finished the type rating, he'd get the job and thus the line flying?
Ducking with just a type rating and no type experience is not usually a very career advancing move. Anyone can, after all, buy a type rating on absolutely anything.
Didn't Bricknell run a Porsche hire car franchise at one stage?