That phrase is literally linked to an article called "Sweden: 'We don't accept cash'" (https://www.credit-suisse.com/us/en/news-and-expertise/economy/articles/n

That phrase is literally linked to an article called "Sweden: 'We don't accept cash'" (https://www.credit-suisse.com/us/en/news-and-expertise/economy/articles/news-and-expertise/2015/03/en/sweden-we-dont-accept-cash.html https://www.credit-suisse.com/us/en/news-and-expertise/econo...). It seems like what you are saying is that they are just making some sort of pun, but you can see why this would seem like it's about people being suspicious of cash.