...that he has a contract, and needs to be paid double, not 1.5. He would also think about whether he has a request for overtime. Assuming he does not have a request for overtime, he would suggest to the supervisor to check the list to see who does. That person should get the double pay. If not, that supervisor should find a junior worker to do the work at double pay. If the supervisor refused, that initial person should perform the work as an assignment, and then make sure the right person is also paid. That's the way he would do it, if he was unionized airline pilot.