Economist Hyman Minsky did. With credit now expanding, the sophisticated economic model provided by Minsky was working its way toward what he called Ponzi finance. First, he claimed the system would borrow in low amounts and be relatively self-sustaining – what he termed “Hedge” finance. Then the system would gain courage, lever more into a “Speculative” finance mode which required more credit to pay back previous borrowings at maturity. Finally, the end phase of “Ponzi” finance would appear when additional credit would be required just to cover increasingly burdensome interest payments, with accelerating inflation the end result.