Complex sentence: If they are restricted to work with a particular employer, they might submit to threats if it is preferable to deportation, and they may fear shame if their family has supported their arrival to New Zealand or are relying on their earnings.
Split into simpler sentences: If they are restricted to work with a particular employer, they might submit to threats if it is preferable to deportation. They may fear shame if their family has supported their arrival to New Zealand or are relying on their earnings.