If inflation has been understated by just three percentage points per year since 1994, then wage earners, who have only received "cost of living" adjustments, have lost 55% of their purchasing power. No wonder both spouses have to work (some with two jobs) and still have a hard time making ends meet.
But, there is another factor at play here. In the Industrial Revolution, innovation benefited all workers. It wasn't hard for workers with little formal education to learn how to operate machine tools, and they could master skills needed in the new industrial economy.
But, that is not true today. In fact, the National Federation of Independent Business's surveys have for some time now shown an increasing trend that businesses cannot find the skills they need. As a result, jobs go unfilled. The jobs that are available require skills only learned through and intensive educational process, such as majoring in engineering or computer science at a university.
These are the folks who are getting the high paying jobs. Those with few or no skills must take much lower-paying service type or minimum wage jobs. In the latest unemployment survey, the unemployment rate among college graduates was 3.3%, for those with high school degrees it was 7.3%, and for those with less than a high school diploma, it was 11.1%. Thus, it appears that the nature of the new technology revolution is also contributing to the income gap.
Other Endemic Factors
For the past five years, multinational corporations have been hoarding cash. Capital expenditures are at their lowest growth levels in six decades. Perhaps these large businesses have recognized that growth will be slow and that revenue growth will be a function of acquisitions.