They got involved in the heydays of DN, S2 and others when pilots were jumping ship (actually plane) every other week. So the airlines contested i.e. lobbied DCGA and the ministries that because they were investing so much in the pilots training etc. they needed them to stick around for a little longer otherwise they would have to shut shop.

Most airlines esp. 9W makes pilots "pay" heavy bonds to prevent them from fleeing at the drop of a hat. Esp. to international airlines where DCGA and other Indian authorities have limited control.