Swedish authorities did write a report about this about a decade ago[1]. Long story short: The immigration approach won't really work as different people have c

Swedish authorities did write a report about this about a decade ago[1]. Long story short: The immigration approach won't really work as different people have cultural differences, educational differences, ambitions and life-goals, and it's unlikely that there will be enough compatible people that are actually interested in the openings that actually exist. [1]: https://web.archive.org/web/20170216060417/https://www.tillvaxtanalys.se/download/18.6a3ab2f1525cf0f4f95eb8c/1453901727025/Replacement+Migration+to+Sweden-04.pdf https://web.archive.org/web/20170216060417/https://www.tillv... Apart from that, simply replacing the population also presents quite a few challenges that are likely to result in a very infected and polarized debate regarding the future direction of the societies that such replacement takes place in. That being said, I believe you're right about the fact that there's going to be a lot of migrations going on around the Globe for the next few hundred years. It's just not automatically going to solve the birth rate issue.