The number of employers who have been prosecuted for illegal activity, e.g hiring non us citizens at slave wages, taking false social security numbers or avoiding IRS withholding is practically zero , this all in a country of justice, law and order and where slavery is outlawed, nobody needs to be afraid of reporting crimes in the US, what is your point?
Are you so afraid of law and order and seemingly in favor of legalized slavery for immigrants that you wish to propose we allow more people to work jobs American won't do for nothing, while charging Americans for the differences in taxes and other social expenses that the employers are supposed to be picking up in a legal system?
Nobody has to be deported, just laws need to be enforced, so that our country returns to a state of law and order, which is a necessary component of freedom and liberty!
What is the number, and what is your source.