This is my layman’s understanding; “The price of Big Macs should be rising at a steady rate. It is bad if the price of Big Macs falls. Let’s put in some polici

This is my layman’s understanding; “The price of Big Macs should be rising at a steady rate. It is bad if the price of Big Macs falls. Let’s put in some policies to make sure the price of Big Macs rises steadily! Oh wait, they aren’t rising steadily, they’re rising much slower! Our policies aren’t working! Hmm maybe it’s ok to have periods where Big Macs get cheaper, as long as there is an equal period afterwards where they make up that loss and get more expensive. We can call this symmetry!” The article is basically calling this idea of symmetry a big joke.