Other main reasons for slow recoveries now and going forward:

1. Law of large numbers. The last time the economy grew above a 4% average was 1982 to 1990 . In 1990, the economy was about $6 trillion today it's about $20 trillion. It would be hard for a $20 trillion economy to grow consistently at 4%.

2. Baby boomers are retiring en masse and this impacts spending, government deficits, debt, productivity and is and will be a drag on the economy.

3. Millennials have too much debt and will not spend similar to past generations. Many entered the job market during the Great Recession. Just as the Great Depression impacted that generation's view of stability and money, the impact of the Great Recession will impact in the same way Millennials.

4. Much of our economy is no longer a free market. Most industries (energy, retail department stores, banks, pharma, defense, Wall Street firms....) are dominated by a few companies that reduces competition, places to work, productivity, innovation, growth. Our economy is more of an oligarchy.