Credit is a voluntary thing. Both sides can agree to create credit lines (trustlines) out of thin air without any third party ledger or permission. (Well maybe except Usury laws.)
Now the problem with credit is that you don’t know how solvent the debtor is and many debts they have. Credit agencies have sprung up to try to address this somewhat.
But the whole POINT of value based money is to introduce a third party representation of real assets, and that real world scarcity requires solving the double spend problem.
So the whole thing with every technology is remembering that A paid B, and not forgetting it (eg make collusion really infeasible).
Many blockchains are just append only databases stored on every node. They elect a leader based on PoW or PoS and it’s horribly inefficient. There are far better ways.
But anyway back to credit. Money is a social phenomenon that benefits from a network effect. A casino’s chips are worthless as a medium of exhange outside the context of the casino and the same goes for JPY, EUR etc.
Inside a community currency where everyone began to accept it, you can have the ability to print more money same as a Harvard Facebook has the ability to add features you don’t like but you keep using it. The only difference is that these decisions can be done democratically. So like living in a city whose policies you don’t all agree with.
They can use this money for Basic Income and other things like public infrastructure.
They can peg to an outside currency AND print/dilute it gradually to redistribute wealth in a voluntary way that even anarchco capitalists will accept.
That’s one of the features of Intercoin.