Another option does exist. In the process of becoming independent, a nation might be more likely to take a leap into the future than a nation with entrenched systems will usually be. To be clear, this option requires a new and different monetary process, but it does not require a new and different monetary structure: the standard central bank/central government arrangement suffices.

As an independent nation Scotland would have a sovereign currency. It could (as any such nation could) use its currency to transform the outcomes for society of the existing economy (any nation’s existing economy): it would become completely self-regulating, with no unemployment, poverty, taxes, or public debt and increased sustainability. To be clear, there would still be no limit on income/wealth. [The absence of taxes/public debt would depend on total spending by government not exceeding its current per capita level.]

This monetary paradigm can be thought of as an expansion on the concept of 'quantitative easing'. Like QE, the money (as currency) to accomplish those ends would be created as needed. Like QE, creating that money would not involve creating debt. Unlike QE, there would be built-in protections against inflation, beginning with an absolute limit on how much currency would be created: the amount would be determined by demographics, and only that; no person, committee, or organization would have any say in how much money would be created.