ABSOLUTE & UTTER RUBBISH
Talking as a pilot, and previously an engineer, both an aircraft engineer and in the Telecommunications industry, I can say that this bonding idea is regarded in most non aviation industries as BOLLUX!
I had far more courses and LOADS of training in the telecomms sector. Yes people did move around a bit, but they do in ALL industries! But they also had a high regard for their employer and their employer regarded training as a hugely important part of investing in their MOST important aspect of their business i.e. THEIR PEOPLE.
It is just complete and utter rubbish to think that bonding is OK and reasonable. Running a business is and should be WIN/WIN situation for both employer & employees. Instead of having a child like tantrum every time some one wants to leave the employer should sit down and discover what was wrong, then most would find out it wasn't just the money but a far more adult reason. The short term outlook of these companies never ceases to amaze me. Why haven't the low cost airlines of Europe followed the lead of the true original Low Cost Airline SOUTHWEST and made their people a priority. They all bull!!!! that they have read "nuts" the story of Southwest and then go on to ignore the advice it so clearly gives.
Bonding is just an excuse to shaft your people and that is the way it will always be perceived because it is not an adult way to treat an employee, it just says from the very beginning "I don't trust you", "I have no respect for you", "to work here is bad so I must shackle you like a slave".
Treat a person like an Adult and you will get an adult response otherwise expect them to walk.