that is because they have children that are 100% legal U.S. citizensFood stamps? Yes, they can get them.
http://washingtonexaminer.com/usda-to-mexico-illegal-immigrants-can-have-food-stamps/article/2528152
Welfare? They also collect.
http://www.judicialwatch.org/blog/2011/04/most-illegal-immigrant-families-collect-welfare/
http://losangeles.cbslocal.com/2013...rojected-to-receive-650m-in-welfare-benefits/