When they do, they work hard, buy their own food, pay taxes, doing work in "your house" that you & other members of your massive house don't seem to want to do.
I do truly believe this describes most illegal immigrants in the US, and most of them are good people. I say this as a non-American, but I also totally fail to see how this justifies what is clearly and knowingly breaking the law. If I either surreptitiously crossed the US border, or went through a normal crossing and overstayed my stated length, I would fully expect them to throw my ass out when they found me (and I would NOT be surprised when they came looking for me either). It is totally true the US has great opportunity and comparative wealth for all of these immigrants, but to deny the US has an illegal immigration problem is naive. Also - processing people through normal border crossings is how you do background checks to keep the small percentage of actual criminals out. Any criminal record at all will lead you to being rejected at the US border for entry (I know this as I have friends who've spent thousands to get pardons just for a trip to Vegas). That sounds like great motivation to not check in at the border to me.
The less time planning, the more time programming.