78% of people over 18 have a drivers license (B).
The remaning 22% include those who cant afford it, dont want it, are yet to get it (not everyone feels the need to get it the day they turn 18) or have little use for it (like living in inner stockholm and using public transportation.
Lets estimate 5% are yet to get it, 5% cant afford it and 5% dont need it. That leaves 7% that try but fail to get it.
That would mean around 11 out of 12 people who want a drivers license eventually get it, likley higher percentage that try and pass. Ceirtantly not a scam,