We’d need to assess the merit of anarcho-capitalism vs collectivist democracy to understand whether disempowering governments would in fact decrease economic stability.
If one were to completely oversimplify everything the roman empire fell into the "war + debasement" bucket though but it also had a lot of other problems. They were actively fighting a war which meant they couldn't control the influx of barbarian refugees (huns drove them out) at their border. They then committed a grave mistake. They deported all barbarians and killed those who stayed. Some barbarians gathered near the border and formed a big army which then proceeded to plunder Rome. The problems didn't start with money, they got worse because of money.
So, it results in destabilizing governments that are overspending, but stabilizing those that are not.
How many times does this get repeated? No money is being printed right now. No MMT is happening. No helicopter money is happening. Barely any Keynesian fiscal stimulus is happening (the US has stimulus checks but the EU doesn't and it's suffering for it) and the fiscal stimulus that is happening is financed via debt. No money is being printed right now.
The majority of money that the Fed creates is primarily issued via debt. The part that isn't is used to buy assets that are being put on a balance sheet and the sale of the assets will often remove more money from the economy than it added. QE does nothing but fill bank reserves so that banks lend out more money.
"Financed with debt" that is never going to be paid back. You have to think who is doing the actual financing here, and why they aren't getting interest on their financing.
Citizens of Turkey, Lebanon, Nigeria, Ethiopia, Zimbabwe, Argentina, Venezuela, Iran, Belarus, for example, all have their savings being stolen through inflation to greater or lesser extents.
The Zimbabweans that lost all of their savings to hyperinflation were literally counting the days until Mugabe's government collapsed.