The jobs lost are middle income jobs with benefits, such as pensions, health care, disability, sick leave, vacation, job training. Illegals don’t get those types of jobs. So we’ve got illegals working as hourly workers in gardening, cleaning, construction, farming, and those are jobs that used to be done by American teens or college students.
In addition, today’s service sector jobs don’t have those benefits, so the quality of jobs has declined a lot. I just saw a story on CNN this week about a mother who took a couple days off to care for her son who had broken his arm, and she was fired. Now she works part-time, but no benefits.