What you call socialism would be termed social democracy here, and actually, in Spain there are a lot of actual socialists (not social democrats) and a decent amount of the voter base is communist. Actual communists.
Personally I hate communism and I won't understand why anyone would be in favour of the system that has worked like a cancer everywhere it appeared. Thanks to it the Eastern Europe is still in a disadvantage compared to its Western part and countries where Communism has ruled for too long have gone through civil wars, martial law, dictators and poverty. Communism cannot exist in a modern world because it's model of power is delusional, mythical. It will always end up the way the Animal Farm did.
Actually, there isnt any such country. Spain is one of the countries which have considerably lower taxes in europe.
And, in other countries outside europe which have low income tax rates but still provide full coverage of free services, these are generally funded via corporate taxes.
I won't argue about the level and number of services offered in Spain because I haven't been there, but to compare:
Bulgaria 10% on both corporate and individual
Belarus: corporate 18% individual 13%-17%, no taxes on cryptocurrencies
Even in Russia you have 13% individual and 20% corporate and I believe all these countries offer free education.
Of course you're correct that taxes in spain are low if we compare to countries like Germany or Belgium but there are also countries that offer more freedom in this matter, even in Europe.
That said IMO every country that has a higher income bracket for a certain level is as socialist as it gets. Awarding people lower taxes for being less productive and punishing others with higher ones for doing something right is exploitation at its finest. I like it when I have everything clear on paper as to how much a certain procedure costs. The problem with prepaid, government run healthcare is that it creates lines, huge lines. If you are in need you end up waiting months or even years for it because there are hundreds of people waiting for the same thing and the hospital has a limited number of (...). Many people have to go to a private clinic and pay anyway, even though they've been paying healthcare tax for the last 20 years. I know people that have been in such situation and think they've been ripped off by the system.
To give you an example, I had my health insurance years ago and I had to go to the dentist. I got told that x-rays aren't refunded and so are painkillers and so is the root canal treatment that I had to do. Guess what my insurance would cover. The extraction...
I agree with the rest, the system in the US isn't good and the corporations aren't good but the system in the EU isn't either. They're blindly taking in migrants that they later have to fight on the streets and they're making the citizens pay for it all.