Sweden was a place where semi socialism semi worked. It almost worked because it was a homogeneous populace with a strong a work and value ethic. Then they put a pack of radical feminists in charge and started importing murdering savages. So that was that.
While a homogenous hard-working population helps, it just delays the inevitable; the savages were imported into Sweden for the same reason the US imports them: a negative birthrate among the native population. Now when they trumpet a higher US birthrate, you have to note WHO is giving birth - they are now considered “Americans”.
Few people have a work ethic like Germans, yet even they were importing people decades ago (Turks in West Germany, Vietnamese in the communist East); for many years Ireland was the last Western European country with a birthrate that would replace its population, and they may not even have that anymore.