Point is, if you raise them high enough and keep them there for long enough you can disarm any inflation and any currency depreciation, at the expense of econom

Point is, if you raise them high enough and keep them there for long enough you can disarm any inflation and any currency depreciation, at the expense of economic throughput. And so that's what they did: https://tradingeconomics.com/russia/interest-rate https://tradingeconomics.com/russia/interest-rate It's macroeconomic policy 101, tested many times throughout history in various countries, both positively (when you do this then inflation/depreciation stops) and negatively (when you don't do this then inflation/depreciation continues). There are many unanswered question in macroeconomics, but this isn't one of them.