In the recent movie “Love and Other Drugs,” the rakish, underachieving lead character Jamie (Jake Gyllenhaal), gets a job as a pharmaceutical sales representative (PSR) on his way to a complicated romance with Maggie (Anne Hathaway). At a family dinner, Gyllenhaal’s messy, overweight but very business-savvy brother, played by Broadway’s current darling Josh Gad, explains the appeal of his brother’s job to their parents, played by George Segal and Jill Clayburgh. As Gad explains to them, PSR positions are the only entry-level jobs in America that can pay “a hundred grand a year.” (And there was no mention of overtime pay in the movie dialogue!)