It seems like all commentary on the situation of America today is put into the context of post-WWII. That's like studying the history of Rome, but ignoring the 500 years of history that happened before Ceasar's armies crossed the Rubicon. If you intentionally limit your vision of the world then you will eventually be caught off-guard by larger trends.
This problem is especially true in the field of economics.

The fact is that the financial system, as it was structured in 1944, was an experiment. No one knew if it was sustainable, and it certainly wasn't intended to last forever.
That world has been slowly, and increasingly, breaking down for the last several decades, but because no one looks more than 65 years into the past no one can imagine a different world. Everyone is terrified of the "unknown", when in fact is isn't unknown at all. It's just different.