Herb Kelleher did ok, lots of the pilots made a million also.
Treat em well and employ those who will be based where they want to be on good terms and conditions and I think you would see very few leave.
The bond system was fair and let's face it, Most airliner type ratings are not that expensive. A gulfstream G650 is $100000 apparently.
Corporate greed and mis management has caused most of these problems
I am sitting in a hotel surrounded by 12 MPL students from Lufthansa, all had their training paid for and even though there are no positions for them at the moment, they are being seconded to a partner airline while they wait. All nice guys and girls with solid educational backgrounds. Mostly engineering/science.
So it can be done properly if you take greed out of the equation.