I've a different view on this. I know I'm going to the extreme, the following view is rather controversial.

First of all, those who have raped those women in the name of gynecologists and other doctors, they need to be put behind bars. Those quack doctors who have killed patients knowingly or unknowingly, they should be put behind bars. Period! Those quack doctors who have injured patients, the patients should sue them and get justice.

I'm talking about those who are found to be quacks but otherwise have been excellent doctors, how about them. They have fake I.Sc. certificates, but have genuine M.D. I think they must be penalized, but should be given a second chance. Maybe they should be allowed to retake the I.Sc. tests, and also forced to take the license exams again. They should definitely pay proportionate fines and get some years in jail.
This is because in this world, there are too many fake certificate holders... everywhere! From the very beginning of this world, humans have been faking.. fake resumes, fake certificates etc. Especially in Nepal, it is not easy to get into the medical college. Sometimes you don't have money, sometimes you just don't have time and other times, inspite of rigorous desire to be a doctor, you just don't have that luck. Some of these quack doctors have become doctors despite all the odds, and should be given a second chance under some conditions. The question is how to make sure the quacks will get rehabilitated the right way the first time.
I know this amnesty will have negative consequences and implications for future would-be doctors. Food for thought!