Over the last few days, I’ve seen a deeply misleading claim circulating around the internet–that Bernie Sanders is supposedly going to increase government spending by $18 trillion over 10 years. This claim originates in a Wall Street Journal article by Laura Meckler. The article is so deeply misleading that Gerald Friedman, the economist cited by the WSJ, has felt compelled to come forward and explain that his research does not at all support the WSJ’s conclusion. Indeed, Friedman claims that Sanders’ plan will actually save money. To understand how, we need to know just a little bit about healthcare economics.