The only way the DGCA will wake up and smell the cofee, is when the GOI, is hit by economic sanctions by foreign countries. By that I mean a very restricted sanctions such as refusal for AI or Jet or anyone to land in the other countries. A bit extreme? Yes! But that is all that will get the Babus' attention and the corrupt heads might roll. If the expats complain loudly and frequently to their individual governments citing unfair practices, not following ICAO guidelines or whatever ,it might get some action.
Unfortunately,that will happen when it is a cold day in hell.The almighty dollar/pound/yen/yuan is much more powerful than a few hundred pilots.
Alt3.