It seems like the "right" way to solve this problem is to just design a currency with whatever monetary policy you like baked in. Then the people get to choose

It seems like the "right" way to solve this problem is to just design a currency with whatever monetary policy you like baked in. Then the people get to choose their monetary policy based on which currency they support. A government could endorse a particular currency as the official currency, thereby giving it the same capacity to regulate monetary policy governments currently enjoy.