Illano comments on Harry Potter and the Methods of Rationality discussion thread, July 2014, chapter 102 - Less Wrong Discussion
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Yes, of course. But the net average quality of life is increased overall. Please examine the posts that I'm replying to here, for the context of the point I am making. For convenience I've copied it below:
If you are entering the argument with a claim that the UK's current inhabitants can be utilitarian and simultaneously weigh their own utility higher than those of other humans, then you should be directing your argument toward buybuydanddavis' post, since ze's the one who said "That weighting factor should be 1 for all". I am merely noting that not being able to fit billions of people in the UK is not a valid counterargument; net utility will still be increased by such a policy no matter what the UK's population carrying capacity is.
I'm not sure this necessarily holds true. In very broad strokes, if the quality of life is increased by X for a single immigrant, but having that immigrant present in the country decreases the quality of life for the existing population by more than X/population, then even if a specific immigrants quality of life is improved, it doesn't mean that the net average quality of life is increased overall.
Yes..... you may be right, and it is a compelling reason, for example, not to admit terrorists into a country.
I suppose that if a particular individual's admission into the country would depress the entire country by a sufficient amount, then that's a fair reason to keep them out, without worrying about valuing different peoples' utilities unequally.