Dear Mr Raghavan, Your idea is nice and novel but totally idoitic and illogical because of the narrow scope of the subject you have chosen. Why only Ph.Ds? In that case all academic & non-academic qualifications for all jobs should have different expiry dates according to circumstances.First try to see how to eliminate outdated politicicans and outdated drugs from circulation. Then come down to other qualifications, of course after getting a Ph.D for yourself.Good luck!
