These days it would be next to impossible for someone starting out in a first world country to obtain a flying licence by dodgy methods. The background checks, retention of training records by the flying school, computerised exam testing and officials who won't take bribes, make for many layers in the Swiss cheese model. In the past a few may have slipped through the net, but this doesn't imply a systemic problem, holes were exploited which have now been closed.
If 40% of qualifications are found to be fraudulent then the whole system is rotten and needs to be rebuilt from the ground up and I would suspect that it isn't confined to the aviation sector in Pakistan. The automatic acceptance with minimal checking, of qualifications issued in third world countries for any profession needs to be reconsidered.
An Indian driving licence holder will have to do a full driving test before being issued with a local licence in most countries, as the standards are known to be appalling where as a medical qualification from the same country would be far more easily accepted ??? This guy probably found it easier to be allowed to perform surgery in Australia than to be allowed to drive a car.
https://en.wikipedia.org/wiki/Jayant_Patel
In some respects, a CPL holder with a recently issued licence and limited experience would be more attractive to an airline than a Captain with decades of flying as claimed experience, training records and exam results would be much easier to verify.