I just have one response to this, "what the f#4k?"
The Mexican government has been working with the United States Department of Agriculture to increase participation in the Supplemental Nutrition Assistance Program (SNAP), or food stamps.
USDA has an agreement with Mexico to promote American food assistance programs, including food stamps, among Mexican Americans, Mexican nationals and migrant communities in America.
Basically, the federal government is going to work with the government of Mexico to find illegal immigrants in the US with anchor babies, who would be eligible for food stamps since their illegal immigrant parents have no verifiable income, to help subsidize Mexico's reconquista.
The goal, for USDA, is to get rid of what they see as enrollment obstacles and increase access among potentially eligible populations by working with arms of the Mexican government in America. Benefits are not guaranteed or provided under the program — the purpose is outreach and education.
Apparently it's not enough to hand out exit maps to its poorest citizens, Mexico wants to help them take advantage of all the freebies they can get by sneaking into the U.S.