I can see what he means.. middle class families have kids, who more times than not become middle class families themselves... if families have two kids, population growth in the middle class stops.

The poor have numerous kids.. and while they are the largest consuming base, their consumption levels are far below that of middle and upper class.. meaning their growth potential (outside of their own class) is being blocked by the lack of new middle class income to fuel the economy. The theory being that because all we have is immigrants who come into the country to do the production jobs, and have a much harder time climbing the wealth ladder that the economies growth halts.

Who knows. Personally, I think it was a perfect storm of everything that could go wrong in an economy .. from stock crashes, terrorist attacks, debt bubbles, globalization, low birth rates, declining incomes, over stocking etc... the list is endless. Actually.. you could just say "what went right?" it's a much shorter list.

Sell the Vatican and feed the poor who built it with their money will always help the economy. I think the Vatican is not living in the real world!

Fiat Population growth! Hyperinflation!
If Catholics ran the economy we'd lose thousands of valuable prophylactic industry jobs!

That.s very interesting because Vatican Economist are also caused by Low Birthrate.