Who did this stuff before?

One of the prime issues provide by the people supporting amnesty for illegal aliens is that they perform jobs that American citizens don’t want. If that is true, who was performing those jobs before the flood of illegals showed up? There were restaurants then and they had workers; there were lawns then and they got mowed and there were other jobs that supposedly citizens don’t want and they got done too. The unemployment rate is 10% - even higher for those with limited skills and experience – and the pro-amnesty people are still pushing this line. Who are they to say someone with no income wouldn’t take a job?