Assuming they’re otherwise free to quit, I think it depends on the wage:

Coercive labor is work a person does for another person (or for the state) under compulsion, receiving little or no recompense. The most common forms of coercive labor are slavery, corvée labor, serfdom, and debt peonage.

https://www.oxfordreference.com/display/10.1093/acref/9780190622718.001.0001/acref-9780190622718-e-288