As a Scandinavian socialist I support things like:

• High taxes and public spending - around 50% of GDP seems about right.
• Cradle-to-grave socialized medicine.
• Publicly funded education - up to and including the university level.
• An elaborate social safety net.
• Extensive feminist social engineering schemes (long state-funded paternity leave and so on).

Why do I support things like that? Because I'm used to them and my first-hand experience tells me they work quite well. Also because the Scandinavian countries look good in international comparisons of various things. Though of course we can think of alternative explanations for that - maybe Scandinavia works well because it is populated by Scandinavians (a Steve Sailer type explanation) - I'm open to persuasion.

If you define socialism as "a system with state ownership of the means of production" then I'm not a socialist but some other type of collectivist.