Is there any reason for such claims or are you just dreaming out loud?
This idea that blockchain is gonna be used everywhere doesn't make much sense.
Blockchain is a slow and expensive database. Unless you have a very specific problem that blockchain will solve, it shouldn't be used. In most cases, blockchain is not applicable to the problem.
I so t think governments are going to use it everywhere to become more transparent. There are other way to become more transparent, which are less expensive.
It is based on information available on the internet, in case you haven't read enough about the topic, it would be great if you read more about governments interested in using blockchain.
There are much better blockchain than bitcoin these days, not sure what source of news you reading, if you refer to btc, yes it is slow but not for a long time, LN is here to solve that issue. It might be expensive if a centralized organization will implement their own blockchain, but if they use or support existing ones then they don't have to spend resources owning all nodes, there is where decentralization takes place when individuals run their own blockchain node.