And it does support my point, for his argument covers ALL immigration. If it only applied to the legal sort, then it wouldn't, but it refers to all immigration. Furthermore, I'm arguing that if we made them all legal, we could reap many benefits, so of course it supports that point, as well.
Of course then they would demand health care, retirement bennies, paid vacation, family leave and sick days. The employers would let them go and find some new illegals.
(1) Do you reckon that many of the benefits to be reaped would be of the social welfare variety, by the now-legals, and paid for by taxpayers? Low education legal persons are quite costly.
(2) Who is the "we" to whom you refer? Employers profit directly from importation of illegals whose social upkeep is paid by taxpayers. It is therefore a subsidy. I thought economists abhorred subsidies.
(3) If each additional immigrant has a marginal benefit, does that continue until 4 billion immigrants populate the U.S.? If not, where does it stop? If you can't answer when it stops, why should we impute any validity to your answer of "not yet" ?