Without telling us in why you think that, your comment just comes across as throwing insults around. Such a serious accusation requires evidence.
1. https://en.wikipedia.org/wiki/Debt:_The_First_5000_Years#Cri...
2. https://www.ft.com/content/04e44606-d9a0-11e0-b16a-00144feab...
I think what he said is that things aren't working for many, this crisis showed that to everyone and we should therefore keep this in mind and do something about it. The part I liked in particular was the implication that we should keep in mind that the economy exists primarily to satisfy our needs and not the other way around.
I don't see anything there that suggests he misunderstands finance, especially with a reputation for the opposite, or that he doesn't get the philosophy of contract law (I think that's what you're hinting at), so that's why I asked.
In fact, he challenges it so directly that you confuse his intentional materialist characterization of finance as a misunderstanding. Mostly, I think this is a result of our ideology being so pervasive under capitalism that we are accustomed to describing our artificial economic structures as borderline laws of physics. Graeber here is simply trying to insert a wedge into that line of thinking, not propose an entire alternative socioeconomic process.
It’s a bug report, not a pull request.