http://www.ccis-ucsd.org/PUBLICATIONS/wrkg123.pdf
On this article we can see that for many years Mexican officials..
in the 1920's,1930's,1940's,1950,1960's
Mexican officials...DID try to prevent emigrants from leaving mexico but american.."enganchadores" would go to mexico and practically bribe mexican officials to brake the law...
and everytime...that our american government did not need them...so easily would just try to kick them out......
these kind of irresponsibility of just moving people..back and forth has created...a society of nomads....
and now america wants to reform again?
well hopefully mexican officials are not that stupid...that if a war with china, or iran or some world event in a bigger scale occur...
and some 3 million americans are fighting some foreign war and the domestic sector needs...flesh young blood...to exploit and save on profits for THE CAUSE...
not to fall for it...and just keep heading its own way
because but sides are equally responsible..americans for breaking mexican laws..and mexicans..practically falling for it..knowing well that expulsion came next...