To make it to Australia,illegals have to first pay thousands of dollars to get on the boats,and hope that they dont sink in the rough conditions and get eaten by sharks.Then they have to somehow dodge the Navy patrol.If they make it to land they have a thousand miles of desert to cross while enduring ungodly heat and dodging the worlds deadliest animals.If they make it to the inhabitated areas from there,and somehow go unnoticed from immigration agents,then they deserve to stay just for the effort.
Meanwhile, all it takes is a little cash and the right 'coyote', and it's goodbye Mexico, hello America! The worst they face is dehydration and maybe the odd rattlesnake or scorpion. Heck, I faced plenty of that on my hike of the Pacific Crest Trail through SoCal!
And, it should be noted, my wife and I encountered a group of five Hispanic-looking men who were not talkative -- this was less than fifteen air miles from the Mexican border. Being that they were already in the U.S., and we were maybe 15 trail miles from the Border Patrol station near Campo, we had no chance at turning them in anyway. And for all we really knew, they were just good old fashioned Mexican hikers! (Though I doubt it).