Then you base your statement on supposition. So much for your argument.
It is a favorite tactic on this website to demand figures to support obvious truths, such as the fact that a large percentage of illegals work as independent contractors. Libertarians love to do this with arguments against drug legalization for the same reason: It is impossible to find dependable research on a subclass that is trying very hard (or even no so hard) to hide illegal behavior from authorities. None of this makes my point any less valid: There are literally millions of illegals in this country who will not be affected in any way by more rigorous enforcement of programs like EVerify. You may not care to address this point, because it does not fit your narrative, but dismissing it won't make it go away.
Any logical person will observe this to be true: A large percentage, perhaps even a majority, of illegals work as independent contractors to individuals. If your only counterpoint is that you disagree find your own damn research.