Scott Alexander's post on cost disease:
"Imagine if tomorrow, the price of water dectupled. Suddenly people have to choose between drinking and washing dishes. Activists argue that taking a shower is a basic human right, and grumpy talk show hosts point out that in their day, parents taught their children not to waste water. A coalition promotes laws ensuring government-subsidized free water for poor families; a Fox News investigative report shows that some people receiving water on the government dime are taking long luxurious showers. Everyone gets really angry and there’s lots of talk about basic compassion and personal responsibility and whatever but all of this is secondary to why does water costs ten times what it used to?"
A summary of the many responses to the post are here.