Decentralized economy? It is just like you having a nation without law, I am not sure decentralization will ever work for economy, it is just best to stick with decentralized currency which will in turn help any economy than to talk of decentralizing economy. There cannot be decentralization without blockchain, and when it comes to blockchain, it requires the use of code to control things or make decentralization happen.
What code will be written to generally decentralize the economy or give people the full power to do whatever they like as regards economy without the government interference or control? Lets not go this way at all.
I think a lot of people think everything can be decentralized, and everything should be decentralized. It's not possible to blame them either, since even projects in crypto and their developers all think the same things. This forum for example is best centralized. I can't imagine what chaos would take place if we tell the mods and admins the forum wants to self regulate.
Now imagine if the same happened to some economies. I believe developed economies in some countries would do well but for corrupt ones the countries would just collapse.