Actually, as someone mentioned above, unionization seems like the best answer, and a great song for that is "Talking Union"--I couldn't find it on the DT. It's a standard "talking blues" like "Talking Dustbowl" or "Talking Fishing," both by Woody Guthrie:
If you want higher wages, let me tell you what to do,
You got to talk to the workers in the shop with you,
You got to build you a union, got to make it strong,
And if you all stick together, folks, it won't be long:

You'll get higher pay,

Better working conditions,

shorter hours,

Take your kids to the seashore.

There are several more verses, but I don't have them at hand. Maybe someone else can add them. --seed (I guess you were right, Zorro. I did have something.)