 From this it is assumed that the willingness to take undesirable jobs is what gives undocumented immigrants their employment.Evidence for this may be seen in the average wages of illegal day laborers in California, which was between $10 and $12 per hour according to a 2005 study, and the fact that this was higher than many entry-level white collar or service jobs.Entry-level white collar and service jobs offer advancement opportunities only for people with work permits and citizenship.