The singers here describe a job that is so terrible and that only a disgusting person could possibly take it. (For those who haven’t seen this clip before, I won’t spoil the fun by ruining what job they’re discussing. It’s funny.) For jobs that are dangerous or not-enjoyable, workers usually must be paid a higher wage to work that job. That’s called a compensating wage differential and this theory explains, for example, why many plumbers earn higher salaries than social workers.