Why do you believe that "immigration is good". I hear this a lot and it seems that people have come to accept it as fact. As far as I can tell the argument is that we need migrants to tax so that we can afford healthcare when we get old. But what happens when the migrants get old. The pace of immigration will never be able to keep up. I don't get it. Why is immigration automatically seen as being a good thing for us (note, not the migrants)?