Out of curiosity, what's the proportion of rural or small-town population v. urban population in those countries? I find that tends to be the big dividing line here in the US, and am curious as to whether or not the same can be said elsewhere (i.e. if a lower rural:urban population ratio correlates with a higher probability for Nordic-style policy).

It's probably not the only variable at play here (economic development and education levels could be additional factors), but it might be influencing those variables in subtle (and not-so-subtle) ways.