Interesting. The Report makes several funndamental errors in thinking, the main one being that Mexico will have any interest in halting the flow of illegal immigrants. Immigration acts both as a safety valve for a poverty-stricken Mexican society and as a nice infusion of cash, to the tune on tens of billions of dollars sent in by Mexican expats.
Mexico is hardly likey to give up either of these.
The more I read at the site, and related links, Mexico is also acting as a funnel country for aliens from other countries. So, Mexican illegals, though they constitute the bulk, is only one aspect of the scam Mexico is thrusting upon America.
PS, you are right, the infusion of cash is also coming from those they funnel on through to the US.