One goal of NAFTA was to "lock Mexico in" to the so-called reforms of the 1980s, which created billionaires at about the same rate as they enhanced poverty. These "reforms" are the great benefit to the US owners, managers, and investors, though not to working people. NAFTA was one of those rare treaties that managed to harm the working populations in all countries participating: Canada, the US, and Mexico. The US labour movement had proposed alternatives that would have benefitted the workforce in all 3 countries. Similar proposals were developed by Congress's Office of Technology Assessment (since disbanded). The proposals were never entered to the political agenda, and were even barred from the media.
The attraction of NAFTA for North American elites, the business press reported, was "precisely that it would tie the hands of the current future governments" of Mexico with regard to the economic policy. In brief, NAFTA, duly imposed by executive power, in opposition to the public will.
Does this help? Plus the following was written 20 years ago and is the tip of the iceberg. I've plenty more 'back up', 20 years worth in fact.
http://www.chomsky.info/books/secrets03.htm
The thing about sticking your head in the ground, it leaves your arse exposed to the world.
But yeah, blame illegal immigrants (and China now) instead of looking at American domestic and foreign policy.
South America in general is in a pretty poor state thanks to your government's involvement since the 50s. US involvement in that whole part of the world has been nothing but pure evil.
They didn't need your help, as you so rightly state, but you've never stopped 'helping', have you.