IF i had the chance to managed a certain government i would really apply blockchain technology and give their budget in a form of cryptocurrency or digital currency that could be used as a form of payment and could even trade to fiat money. In this way we could eradicate the corruption because the public could be aware on where the budget of the people coming from taxes will going through. Yet, until now the government is not interested on cryptocurrency or if they are they are not willing also to investigate and checked how cryptocurrency works and how could it will be applied on their system. They just want their business to continue as usual doing ghost project? I do not know maybe!
If all the heads of government have this kind of power to implement anything the moment they get into power, it would result in either two ways. One the world might have been a better place or the we start to groom another set of human demi-god who would turn out to be tyrants and no one to call them to action.
Your intentions are good based on the implementation blockchain to the process of government as corruption is one key thing that can plague the development of any society. However, just jumping into the deployment of blockchain would create additional problem if its not a properly thought out process. In the implementation, people are involved in ensuring that it goes seamlessly so also they can sabotage the entire process and at the end it won't achieve the intended objective.
but not because other governments that do not allow bitcoin to enter their country does not mean that they do not understand the benefits of bitcoin, you mention only the benefits not with its shortcomings and a very large responsibility if bitcoin can be legalized