I thought your article said it very clearly... right here... "This is a massive change. In 1950, a family sending their child to the University of Pennsylvania would only spend 18 percent of their annual income (if they paid in cash) to send their kid to study. Today it would consume 79 percent of gross annual income. Even if we look at net take home pay a regular family in no way could send their child to school without going into massive student debt. A good portion of inflation over this time has been masked by massive amounts of debt and financing. Car purchases, mortgages, and college are now financed long-term. Low rates have masked this erosion but with rates reaching the lower bound of the range, the pain of inflation is now being felt by many households."