Why aren't these people arrested as they are here? Detention is mandatory and deportation follows. Sure there are overstayers, but only those we haven't caught yet. With a conviction they have no show of ever getting in legally. I do understand the practical problem with porous borders, Aus is an island.
What I don't understand is how apparently so many survive in America without being eligible for welfare. Surely it can't be living off the proceeds of crime? And, if they work, who can employ them without a Tax File Number?