the article is a little profound, and sounds not so easy, i check many new words, or called economical terms here.
I am subtly confused with the title, what does hat-wearing mean here? is there any collection? Just head decides the hat? the whole passage is taking about notes, and Scottish Pound, and then talks about the currency, about the currency's value and its circulation. chartalism is an interesting word.
if you still not fully understand, pls read the Chinese edition
http://www.ftchinese.com/story/001043181/