I always wonder what might be the reason of centralised authorities not accepting the power of Decentralization and then found the reason,if so decentralization becomes the only means for the transactions then most of the regulators and authorities might be jobless and so they are putting maximum to let down this technology by creating a hype that all the crypto currencies are scam and you can making nothing out of them investing,so we Crypto enthusiasts need to put our maximum efforts to empower decentralization .
You are right.All the regulation clerks/centralised institution clerks will lose their jobs,if the blockchain gets adopted worldwide.This is something normal.The technology progress leads to short term unemployment of all those people with inefficient productivity.They could try to find new jobs, off course.
I don't think the government will really put up much of a fight for them. But for their own interests I think that they would. They do not trust the people to do what is best for themselves, after all isn't that why we have a government in the first place? This government is the one that empowers the regulators and authorities to act within their best interests. If suddenly we have control of all our own finances and spending then it could begin to spiral from there as we (the public) consider what else we've never had control over that we might be able to control better ourselves.