No employees = no employers. Companies having to outsource, relocate overseas and close means less GNP.
No employees only equals no employers paying slave wages for slave jobs done in slave conditions.
Remember the 13th Amendment? How is the threat of imprisonment and deportation different in any qualitative way from the threat of a whipping?
And how, exactly, do you outsource janitorial services? (This I gotta hear!)
Or, if necessary, bring in more LEGAL immigrants to fill those jobs.