The Boss' Son (1978)

"If "Blue Collar" knocked your dick in the dirt, get down and boogie with "The Boss' Son""

Bobby Rose has just returned home after graduating business school. He agrees to start working for his father, a successful carpet manufacturer. Bobby's dreams of a cushy junior exec position are quashed when he's told to report to the shipping department, where he's trained as a delivery driver. Learning the business from the ground up embitters Bobby, as well as his coworkers, some of whom, he discovers, are stealing from the company.