I agree that Japan has its own problems. No solutions are particularly good if they can't get their birth rates up. Singapore also has low birth rates. What problems are preventing high-IQ people from reproducing might be something that EAs should look into.
"How much immigration to allow" and "precisely what kind of people should we allow in" can be related, because the more immigration you allow, the less selective you are probably being, unless you have a long line of qualified applicants. Skepticism of open borders doesn't require being against immigration in general.
As you say, a filtered immigration population could be very valuable. For example, you could have "open borders" for educated professionals from low-crime, low-corruption areas countries with compatible value systems and who are encouraged to assimilate. I'm pretty sure this isn't what most open borders advocates mean by "open borders," though.
The left doesn't "want" a responsible immigration policy either. For their political goals, they want a large and dissatisfied voting block. And for their signaling goals, it's much more holy to invite poor, unskilled people rather than skilled professionals who want to assimilate.
In this thread, I would like to invite people to summarize their attitude to Effective Altruism and to summarise their justification for their attitude while identifying the framework or perspective their using.
Initially I prepared an article for a discussion post (that got rather long) and I realised it was from a starkly utilitarian value system with capitalistic economic assumptions. I'm interested in exploring the possibility that I'm unjustly mindkilling EA.
I've posted my write-up as a comment to this thread so it doesn't get more air time than anyone else's summarise and they can be benefit equally from the contrasting views.
I encourage anyone who participates to write up their summary and identify their perspective BEFORE they read the others, so that the contrast can be most plain.