An "Almost" decentralised currency
This is the proverbial veggie burger with bacon. There are plenty of people who like veggie burgers. And there are plenty of people who like bacon. But there are very few people who like both.

You have a cryptocurrency that's not run by a government. But it also has a central authority that can inflate it and regulate it at their whim. There are people who like these revolutionary cryptocurrency systems that are not run by governments. And there are people who fear deflation and like  currencies that can inflated as deemed suitable by a responsible steward. There are just very, very few people who like both of these things.

You will have to answer this very hard question -- "Why would I want to use a store of value that lets you tax my stored value as you wish?" And "Why should I use a currency that's not backed by a government and not subject to political controls when I can use currencies that are?"