"In 1925, the Masquers Club was formed by actors discontent with the grueling work hours at the Hollywood studios.[6] This was one of the major concerns which l

"In 1925, the Masquers Club was formed by actors discontent with the grueling work hours at the Hollywood studios.[6] This was one of the major concerns which led to the creation of the Screen Actors Guild in 1933." https://en.wikipedia.org/wiki/Screen_Actors_Guild https://en.wikipedia.org/wiki/Screen_Actors_Guild EDIT: I'm pretty sure that if "grueling work hours" and low salaries were enforced by employers to engineers there would be grounds to create a union.