>> Also: When you read the word 'Ponzi' in the context of macro-economics, as opposed to criminal prosecution, you should stop reading right then an there because the author is spouting drivel.

Ponzi borrowing is actually a concept in macro-economics, first explained by the economist Hyman Minsky. From Wikipedia: The "Ponzi borrower" (named for Charles Ponzi, see also Ponzi scheme) borrows based on the belief that the appreciation of the value of the asset will be sufficient to refinance the debt but could not make sufficient payments on interest or principal with the cash flow from investments;

Ponzi borrowing could be restated in terms of borrowing when your model does not take into account the possibility of asset stagnation/depreciation. This phenomenon became a popular topic in 2008, because the housing market had began behaving as though returns on real estate never dropped below 0.