Actually, if you have paid for your training then you are more mobile as you have nothing further to pay.
We must remember that companies do earn a crust from us coming to work, we are not just a perpetual drain on financial reserves for no reason.
How about the poor excel folk who took a loan paid monthly by the company for ratings and then went bust leaving them with no job and a loan. It cuts both ways.
Pilots have to put up with a lot of hit also. Basing, redundancy, shift work patterns blah blah. Sucking thin air from the engine bleed for 900 hours a year isn't ideal either. Glad I don't even do half that a year!
Oh and ask a few ex bmi and monarch guys about pensions......
All in all, you'd have to be mad to stump up 130k or whatever it is now.