alt Hacker NewsThose surveys are both about how elderly people in the Nordic countries report being less lonely than those in Mediterranean countries. They discuss things like whether extended families live together, but don’t really touch on people’s social lives more broadly. I’m not sure that you can draw a sweeping generalization from this that wealthier countries prefer less socialization.
Just keep looking up high quality surveys on different loneliness related topics until you are convinced. There are a lot of different ways to ask it. They all point in the same direction.