American Fed. of Music

In 1942, James Caesar Petrillo, president of the musicians' union, advocated for royalties on records to fund community music projects. The Taft Hartley Act later made this illegal, prompting Petrillo to testify before Congress. He argued that musicians should not be exploited by recordings made for jukeboxes and radio stations.

What was the musicians' quarrel regarding recordings made for jukeboxes and radio stations?

What metaphor did the musician use to express their situation?