There are two sides to every story. I suspect a number of non pilots reading this, if offered a free MBA on the basis that they stay with their sponsoring employer for a minimum period of time after completing the course, would not feel unduly exploited. It depends on the fairness of the terms. At the end of the day bonds (if they even exist) at good employers are largely irrelevant. At dodgy employers they go hand in hand with confiscating passports, pay to fly cadets etc. So I would argue it is not bonding per se but rogue airlines that are the problem.