Personally I wouldn't want to just "scrape" through any regulatory check
Former Mil ATCO tiptoes in again … So we were posted every couple of years or so to a new unit, and then had to go through the local training to get endorsements in all [qualified] operating positions from the Unit's Local Examining Officer (LEO). in addition, the RAF ATC Examining Board would visit every year or two, pick people for up-close practical checks and, for the really lucky ones, a full Practical Knowledge check of documents and regulations which could take up to 2 hours.
My old RAF Form 5995 Certificate of Competency (like a Licensing Log Book, if you will) has pages and pages of certification - including (counting) 10 ATCEEB endorsements - including 3 as a Local Examining Officer at different Units. <pause for applause>
How much scrutiny, in that context, do Airline Captains/FOs get?
Is there an annual
internal check?
Is there any
external body that checks individuals, or the airline's checkers?
… or is it just down to the Company, reporting their licensing decisions to their National aviation authority?
"Quis custodes ipsos custodes", or something like that.