This is a really cool idea. I am interested in seeing other types of cryptographically secure payment or monetary systems come about, but decidedly not ones you

This is a really cool idea. I am interested in seeing other types of cryptographically secure payment or monetary systems come about, but decidedly not ones you'd call "crypto," much like Taler very carefully explains it is not. For example, deflationary gold-like digital currencies just don't work. Fundamentally. It's a futile exercise to debate. But debt-based digital currencies run into some really hard problems. How do you know if someone is good for their IOUs? If someone takes out a large amount of debt, what prevents them from dropping their wallet/identity and moving on to a new one and wiping themselves clear of their debts? Are all of these social issues? Does a new credit system built into such a currency serve as the basis for preventing someone from not paying their debts back to the network? Even if a credit system was built into the digital currency, someone can always create a new identity if there is no requirement for verification, but how do you design a system that does not require it?