I just got instructions for my testimony...

[Sigurd]

oh, and for the record, I've pestered him about contact the unions for a long, long time... But he's young, this is his first job, and he's afraid to be a bother, that the boss will screw him over, that he won't get a good reference, that he won't get as many extra hours, etc. And since I don't have a problem with my pay, there's not a lot I can do for him, this is something he must be willing to do himself... I can offer assistance, but not much more than that...

Unions? Call Arbeidstilsynet. They will go through this business' books and find any discrepancies. If as you say they have not paid wages in full, Arbeidstilsynet would go through all the pay-checks. If there is any faults, your company would be smacked on the palms and forced to adhere to the laws concerning paying employees the correct amount of money. They would also be slapped with a large fine.