When that employer is the only major one around, there is no such thing as a truly free choice.
There's a reason why meatpackers, Amazon or Walmart like to set up shop preferably in areas with high unemployment and why unionization attempts have been so fraught with failures - these companies exploit that the US social safety net is pretty much broken, and when your survival depends on that crap job you're not gonna complain too much.
A truly free labor market is one where everyone can choose to not work without losing their home as a result... only then, employers are forced to provide actually competitive working conditions (wages, workplace safety, equipment, break times).
Face it, there is no way of living "off the grid" to a reasonable degree.