http://seekingalpha.com/article/1759802-fonzie-or-ponzi-one-theory-on-the-limits-to-government-debt?source=email_macro_view&ifp=0 said:
In a nutshell, most developed economies have unsustainable tax and benefit structures that are baked into current spending patterns. Due to rising dependency ratios, these tax and benefit structures will become less generous over time. And as they do, the middle class will find it increasingly difficult to maintain the same level of spending, let alone manage any growth.
To some extent, this story has already been playing out in Japan, parts of Europe, and also in the U.S. for the last 15 years or so. As of 2012, American median household income (inflation-adjusted) had fallen 9% below its all-time peak in 1999 and 1% below the previous cyclical peak in 1989. That's 23 years without any growth, whatsoever, even with the benefits of massive deficit spending.
Looking forward, America's finances are becoming even more challenging as baby boomer retirements bend the debt trajectory upwards, putting more pressure on the average taxpayer. We've illustrated this on several occasions, using projections from the Congressional Budget Office as well as our own research to correct for delusions in the CBO's work. (See (1) and (2) links below, for examples.) These pictures show annual increases in debt-to-GDP getting larger and larger as interest costs grow and demographics worsen.
When even the CBO's optimistic number crunching shows debt ratios climbing exponentially, you have to wonder if Charles Ponzi is looking you right in the eye and making his best pitch.