If something very strange happens and continues over an extended period, people get accustomed to it and come to view it as normal. That’s especially so when the strange set of circumstances is the result of a policy that, as a result of devotion to a wrong theory or strategy, is widely considered to be a reasonable response to a problem.

A good example is the “Patriot Act”, which was introduced in the wake of the 911 attacks. This act dramatically increased the legal ability of the US government to violate individual property rights in the name of greater security and was widely viewed as extraordinary when it was first proposed, but in 2011 there was barely a mention in the mainstream media when President Obama signed a 4-year extension for some of the most controversial parts of the act. With some modifications forced upon the government by the revelations of Edward Snowden, another 4-year extension was approved with minimal public protest in 2015 under the Orwellian name “USA Freedom Act”. My point is, whereas 20 years ago most people would have been horrified by the provisions of the Patriot Act, today most people couldn’t care less. Today, the powers granted by the Patriot Act are generally accepted as normal.

Another good example is the downward drift into negative territory of government bond yields in Europe. As recently as two years ago it was believed by almost everyone that zero was the lower bound for a bond’s nominal yield. At that time, the idea that nominal bond yields would fall to zero was almost unthinkable, and anyone who predicted that a sizable percentage of the bonds issued by European governments would soon trade at negative nominal yields would have been perceived as a lunatic. Today, however, about one-third of the euro-zone’s sovereign debt is trading with a negative yield-to-maturity and people are becoming accustomed to this new reality. Also, the ECB just reduced its official deposit rate from negative 0.20% to negative 0.30%, which only surprised the financial markets because most traders were expecting it to be pushed even further into negative territory.