At some point, our civilization will have to think long and hard about economic truths. I believe that much of the 20th century has seen economics explored from a Marxist standpoint (look at Krugman. He's a Nobel prize winner). If the thinking is skewed from the outset, it makes it hard to see clearly where the discipline has gone wrong.
I think that as we move into the 21st century it will become more and more clear that we have gone wrong, and then we will have to really think about a better way to run the marketplace.
His example of a sum with compound interest resulting in an astronomical sum leaves out the taxes that would be collected on such a sum. And for each 1000$ lent at interest, there would be some number at which the lender was unable to be repaid.
Exactly.