Socialism does not require an entirely different system, one can implement it just fine in whatever democracy one happens to be operating, so large chunks of it are just tweaking some numbers. And some numbers do kinda make a large difference between having to worry about the bank account running dry before the next paycheck or not or being one fall down the stairs away from bankruptcy.

It also declined somewhat since the ~1970s when it was somewhat more socialist than today. But still it is quite a bit more socialist than the US: the points you already mentioned, plus things like universal healthcare, more employee protection, stronger unions (and unions are not a bad word), more paid vacation days (by law not because one has a nice job) and more public/affordable housing.