I think pforte's answer is on the mark.
In the States I work getting a journeyman's license means legally I can work on all things covered by the NEC, although I still may not truly be qualified.
Getting a masters license at least in my home State is more about running a business.
Yes there are electrical questions but also questions about running a business, Workman's comp etc.
I do not know any electricians that are qualified to work on all installations, I know I am not.
