They still have to eat.
They still have to live somewhere.
They don't all walk to work.
And keep in mind that we simply don't have enough citizens to fill the void left by the 50+ million we've aborted since Roe v. Wade.
Whatever amount of money is sent to another country is money not spent here.
All illegals need to be booted out, if we need legal immigrants that is a different story. I am not convinced we need as many as we are told we need.