How were people in the 1930s treated jobwise?

Workers in the 1930s faced the economic realities of the
Great Depression and 25% unemployment.  Workers were expendable - easily replaced by any
of the other hundreds of thousands of Americans looking for work.  So wages went down,
it was easier to get fired, work was more temporary in nature and had none of the
insurance or benefits we have come to expect today.

Migrant
agricultural workers came, not from foreign countries, but from economically devastated
US states like Oklahoma and Arkansas.  The migrants were white families looking for any
way to make ends meet.  Pay was low, working conditions were sometimes dangerous or
difficult, and workers had no way to pressure their employers to improve those
conditions.