See, its more because there is NO defined structure for the examination and its content.
And moreover many of them opt not to go for ground school in india as they are way beyond the term "AFFORDABLE".
Gosh....... i know many deserving candidates passing the exams with the help of "Keep Walking.......(Hope u got the point)"........
Sorry but i guess DGCA has just not been able to tap the GA side to allow enough candidates to pass. May be failing them just avoids the market flooding with many aspiring candidates.......
Cheers