>>6017377
A family doctor in a one payer system, is the person you talk to get access to medical services/referrals . If its a good healthcare system, a physical therapist can also do the referral work.
So if a specialist prescribes you a drug for a edge case, and the specialist retires/changes jobs, updating the drug prescription might be really hard.

Common cases usually involve somebody prescribing you a hypnotic for sleep
And then since they are not there to issue another one, you might find the family doctor who you try to get to renew the hypnotic isn't willing. The catch being that the person denying you the prescription is not forced to offer you a alternate treatment., meaning they can just deny you and then force you to queue again for a specialist.

In itself that isn't bad
The problem is that most Euro single payer healthcare systems are now in various states where the migrants has overloaded it to about 110-120%, meaning the long term trend is the waiting and referral time keeps increasing,
Meaning the likely case is that some people will die while waiting the half a year to 1,5 year waiting time to see a specialist.