alt Hacker News> the skilled worker drags over their elderly parents, and also their "auntie" as a purported childcare giver, and then registers a business and sponsors their village through every loophole and circumvention
It's a balancing at the regional/global level. People desire to move from worse situation to better, which leads to an averaging tendency of the source and destination. You don't like it because average means there's a little less per person where you are, since it's a destination. People at the source like the emigration because there's a little more per person (which hopefully isn't mostly absorbed by some "protective" group, like mafia, bad govt, etc). Let the balance happen; it leads to a better world overall.
Yes, physically that's a good description of the natural flow of things. No, it makes no sense for successful nations to suffer for the benefit of unsuccessful nations, generally speaking. What they should provide is aid, with varying specifics on what that means (e.g. it could be as simple as favorable trade).
To move everybody into the successful nations, rather than engage in the slow work of making all nations somewhat successful, is cruel and insane.