i don't care how many stores are along the border, if we, the usa, could not id sraw buyers for now, (not to mention, we don't know how many times, the straw buyer was the us gvmnt.) no amount of data will help mexico do that either.
also, the cost ( giving away american citizens persoanl info) is way too big, to outweigh, unlikely benefits, (i have no doubt in my mind mexican gvmnt would not solve a single crime, or prevent a single gun to get into mexico).
simply put, it is not worth it. i would not trust mexico's gvmnt for a second, with that data, you just giving out gold mine to potential idenetity theves.
They have proven to be the most corrupt, and incompetent, and outright criminal gvmnt on north american continent ???(your original post said south and not north) That´s a big ol´statement there and I just asked you to back it up. You look around......your government is pretty corrupt too in many ways. You don´t get elected if you´re not in bed with the corporations.
I feel it necessary to add that It will never happen. The US government has shown to be uncooperative and, in fact, a hinderence when trying to control the flow of arms over the border.