It’s interesting that the point of the article seems to be “look how trusting Finnish people are of others”, and yet the take away from the story might be “Finnish people were surprised by the trustworthy behavior of a cleaner”
It's an anecdote, but my mother was certain a cleaner she once had over after winning a gift card for such had stolen something. After a few years she found the thing.
Not her normal behavior. She is usually much too trusting. Apparently people are territorial.
