In economics it's hard to say something for certain until it has been carried out by a big macroeconomical subject, and if what you mean is something of infinite debt accumulation, it's even harder to measure it because it can mean that at any point there could be a non prevented scenario where things didn't go as planned. I doubt there has ever been a case in history of an entity with so much debt, and while maybe it works as is described here, it can also mean that it could act in a totally different way under a different scenario. For example one where a country who's currency is used globally stops being so. Time will tell, I guess. I'd love to see some quotes about how this paper says things work, if you have read it.