Lots of good stuff in here. I don't have any time to respond in detail. Needless to say, my comments were more motivating thoughts than policy ideas. When I say that illegal immigrants are exactly the sort of people we want here, it was a statement to overcome the overwhelming bias against illegal immigrants and get people to think about self-selection and that sort of thing. It was not me saying "let's make it really hard to get in the country so only people that really want to be here get in". It was more me saying "you know those people you dump on - you actually want exactly those people". The author of this post seems to get that, but just to drive the point home.