Mexico has huge rates of illegal power taps on their electric grid. Near their largest city, Mexico City also holds roughly 20% of the population, and the electric theft rates are even higher than estimated by this study, which is an average across all of Mexico. In 2011 it was a 16.7% theft rate. However, in the sprawling and enormous slums of Mexico city, nearly every single electric hookup is an illegal one.
http://www.jsg.utexas.edu/lacp/files/2013-E1.pdf
Meanwhile, in the vast slums of Mexico City, where 20% of the population of Mexico live, there is virtually no sewage treatment, and people are simply discharging raw sewage all over their streets, since they have no other way to dispose of it. In fact, 90% of the municipal wastewater is untreated from Mexico City, and 95% of industrial waste is dumped untreated into this same wastewater. Then this raw sewage is flows directly back into the rivers and streams, which flow back into lakes and the oceans.
http://water.tkk.fi/wr/tutkimus/glob/publications/Haapala/pdf-files/CASE STUDY OF MEXICO CITY.pdf
And a lot of this raw sewage is diverted straight to the fields and the crops, which are grown and contaminated with deadly bacteria, and sent back to the USA.
And this is just the tip of the iceberg. Based on these observations alone, it's pretty clear the government there either can't (not enough money) or won't (endemic and systemic corruption) to properly provide for their people, and they would like nothing better than to dump endless streams of disenfranchised people across their borders with the USA.
Would you like me to also link their horrendous jail statistics? Clearly, the government there has no capacity to even provide the basic services people require to properly survive. While its true their healthcare is practically free, it is bare bones and people regularly die of such common things as childbirth just because of a total lack of medical care and the fact so many births are at home.
So its no wonder that with an enormous influx of illegal aliens, we then get the same sort of behavior they bring over from Mexico. They try to hook up power illegally, they dump waste and trash where ever they see fit, they destroy empty houses to steal copper and other metals where ever they can just to recycle it, they steal our cars by the millions just to drive back to Mexico so they can launder the titles in other countries, and the long list of the ways they come over here and violate the laws in the USA just goes on and on and on.
While it may be true that not all of the illegal aliens are DOCUMENTED criminals, the fact is, MOST of them are used to a life of crime and corruption which is necessary just to survive in Mexico (and other South American countries) so it's no wonder they come to the USA and attempt the same sort of behaviors over here, now is it?