For these they can simply implement a mentorship for especially the medical sector, put them through a program that after you past sufficient knowledge/practical test, let the system’s senior evaluate and monitor for like 36 months. You should not just invalidate their degrees and ask them to go another 57 years to then back in to practice. The people that does evaluation of work should just judge base on the work and result.(say for surgery, there is 1 onsite that minitor the progress and keep marks/records, and another 2 or 3 randomly selected by the province authority to put additional marks from procedural footage/etc. And another round for post surgery recover/results/follow ups. If the best doctors in your system can’t evaluate how their new peers work is up to par, they probably shouldn’t be in that position.
Oh, and fucking pay them well for doing these evaluations.