Socialism only works in small scale among the Christians anyway. Like the Hospitals and Hotel services that Monasteries used to run. And the tiny Jerusalem congregation with the distribution of wealth managed by the Apostles until it got too big and unwieldy. And with ALL OF THEM VOLUNTARY.It's not free, though. You're still paying for it, just through different means. I'm not against that, in theory, but I am against how it manifests in practice, which is grift and bullshit. The NHS is collapsing before our eyes, the US side of the Canadian border is littered with hospitals that exist solely to receive Canadian patients who don't want to wait six months for an x-ray because they're stuck in line behind troons getting their top surgery. Meanwhile, while I don't promote the US healthcare system as a model for the world at all (because it has the worst of socialized AND private healthcare), seeing a doctor is quick and easy (relatively speaking), we have the worlds highest cancer survival rate (a questionable metric to be chasing, tbh, but still, that's how these things are measured), etc. The downside is drugs being promoted by doctors paid to do so, for example, and I'm not defending that, but you get the same elsewhere, just done one more level of bureaucracy up and after the private healthcare system has already paid for the R&D and marketing.
I've lived in seven countries in my life, all except the US being the "free" utopias you covet, and as bad as the US is I would not take their healthcare in a serious situation. The very first thing I would do is come back to the US (or even go to a private clinic in Thailand or something like that).
Socialism isn't a bad thing at base, but it is when you're socializing bullshit across a society that has no shared values. As the countries you named continue to import tax drains and impoverish their tax base you can expect quality to continue to decline.
You can't have the socialism unless you first have the national. It just doesn't work and never will. Once Bernie went open borders he completely lost the plot with his various "free" things.
On a large enough scale the market economy free of usury and with private property works best. Even National Socialism will not work as effectively as a Market Economy since its on a large enough scale.