Like they say, a good thing in the hands of a bad man could very well be used for evil. The most common use of blockchain for government would be electoral process and health care sector, which in my opinion is a very good development. I don’t see how they can use blockchain technology to further their wars and make bombs. The blockchain is an open book so I think any malicious act that may be attempted could easily be traced back to the source thus discouraging such actions.
I do not think that governments around the world are interested in using blockchain technology to improve the electoral process. If they did they were already using it, as we already have the means and tech do do it. Besides, using it this way would not allow them to manipulate elections, which I think they always do. As for the health industry, proposals are being done and there are already a few projects specifically dedicated to this industry as is the case of VEchain.