Need to beef up the Border Patrol to do that!
That doesn't help much when we let millions of Mexicans cross legally every year. Once they get their border crossing cards or tourist visas, they can come right through the checkpoint, get their fake documents, and go to work.
Recently, the border patrol stopped accepting old border crossing cards, because all the old holders were supposed to get the new, tamper-proof card. Well, 600,000 of the cards were not renewed, because the holders were already settled in in the US and had no use for them anymore. These cards are only $45, much cheaper than a $1,500 coyote. If you don't have the documentation to qualify for one of these cards, well, you can buy that too.