In Biblical times, a jubilee meant the freeing of debt slaves.
Ancient Israelites had the concept of a debt jubilee every five decades, where people could come out of servitude, return to their land, and so forth.
Solon, who is credited for building some of the foundations of ancient Greek democracy in the sixth century BC, used a partial debt jubilee as part of his solution to avoid catastrophic class conflict:
https://www.lynalden.com/debt-jubilee/
When Trump sees his economy crash and burn despite his best efforts, I wonder if he turns to a debt jubilee. This would make him beloved on the left, and the right would forgive him for it.
Given his populism and unpredictability, I could see this happening. And if we did stomach such a measure, it would have immediate positive effects on the economy despite the moral hazard it creates.
As I said they should not exist at all. But if the option is political (you call it democratic) control or independence, then definitely independence.
A politician never wants interest rates going up on his watch. People aren't going to vote for an economic crash, so they end up with hyperinflation which is worse. Though we may end up there anyway, so the best idea is no central bank.