A currency as a cryptocurrency has many advantages and will — from my point of view — change economics fundamentally.
· Simple example: such a currency allows a government to help bypass restrictions like the lack of correspondent banks.
· More complex example: such a currency allows a government to directly work together with the population. For example, it is possible for the government to submit debit cards to farmers, so they can rebuild their farms after a disaster; without any banks involved (and within days).
These are just examples. Many other possibilities exist.
Government issued wallets on a government blockchain will be here rather sooner than later. Smart contracts will enable a much closer relationship between government and their population. In my above-mentioned example, a government does not even need to issue debit cards. They can select vendors that carry specific products/services and then tell the farmers what products/services they have been allocated to and where they can get them. The process can be fully automated and is transparent. The money transfer is done in the background.
Or what about credit loans for housing projects, or business startup loans to boost sectors of the economy. Operations that are traditionally embedded in banks / credit unions, but in future can be realized directly by governments?
All the advanteges that you are talking about can be conducted by a government-owned bank.
I don`t think that the government is obligated to help farmers to rebuild their farms after a disaster.That`s why insurance companies exist.
Credit loans realized by the government?This is a pretty old idea and it isn`t working.
The blockchain and smart contracts still can`t replace banking services,but I`m sure that they will,in the not so distant future.