Sack every civil servant
You mean a bit like what happened in Iraq when the Americans got to Baghdad? That worked out well, didn't it?
Contrary to what you may read in your Daily Rag the majority of civil servants are hard-working, conscientious and doing important work. They're likely to be exasperated by the current lack of policy largely because it stops them doing their job. Consider the demands on customs and excise to come up with a viable solution for the ports and the Irish border even though it is still not clear whether there will be a customs union or border posts.
OTOH just keep taking the tablets and shouting at the nurses.