I am a doctor in the US. While it is true that you have to take an exam every 7-10 years depending on the specialty, it is NOT for your license. It is to maintain your board certification.....you can practice even if you are not board certified...because board certification and state license are two different things. In order to maintain your state license you dont have to pass exams but you have to attend a few seminars every year.
I am a PhD too...just having a PhD is not gonna get you anywhere....these days no one cares what your PhD is in....they just ook at your publications and your current research.....recently in our university a PhD full professor ranked faculty got sacked (not fired because he was tenured but he was moved to a small area of the university and pay was reduced to 14% of his original) because he had not published in decent journals in the last 5 yrs. So please dont hop on the bandwagon before you analyze how things are.....PhD doesnt ned an expiry...if you dont do good work...you are just chucked out.
