Please describe the ways in which some countries are "fairly" socialist but aren't actually socialist. I'm not aware of a single example of a socialist nation succeeding in any regard towards creating prosperity for its people. Nor am I aware of a successful national experiment in socialism in the last two centuries of various attempts. Every historical attempt has ended extraordinarily badly, universally failing to accomplish high living standards.
None of the Scandinavian nations are even remotely close to being socialist. They all rely on the market economy, they all embrace Capitalism to significant degrees, they all have property rights enshrined into the core of their economies, they all allow for the vast accumulation of wealth without forced redistribution, they all allow for the private ownership of production, they all allow for the accumulation of and investment of capital privately, they all utilize equity and bond markets that can be bought and traded freely (another critical point to Capitalism), and on it goes. They're all substantially closer to Capitalism than Socialism, which is course why they're able to pay for their large welfare states and other actual Socialist nations universally fail at that. Sweden for example famously had drifted too far toward being an over-burdened welfare state - circa the 1970s and 1980s - and had to de-regulate and de-tax their economy, which then resulted in boom courtesy of increased Capitalism. The nations you refer to, are actually welfare states, not Socialist - there is a very big difference.