M68
Regarding exceptions of doctor confidentiality for "special" cases.
How would a doctor know what the patient's real job is? He could only rely on what the patient tells him.
In Sweden that would be a no brainer. I did explain how our system works a few pages back; short version is that your Doc HAS to report some illnesses to Transportstyrelsen by law, and CAN report some transient conditions by own discretion. Transportstyrelsen then hugs this information until you come to them and ask for whatever permit you need (air, sea, road, rail) and then you are supervised for a period of time, and there's a lot of paperwork and medical professions involved.
So, in Sweden the Doc does not need to know what you work with. They just report as is stated by the law. Transportstyrelsen gouverns the whole thing and when you apply for some license your name pops up from their database.