Clearly those in government don't want to do Brexit
They do. However they have the understanding of the subject matter of an Oxford University humanitarian degree graduate combined with the hubris of an Oxford University humanitarian degree graduate. The so called "red brick lodged in rectum" syndrome.
To put it bluntly, if they had even the faintest clue of how much REAL work it is to execute successfully on this one, they would have never been waving the BrExit banner. I am leaving all arguments of "pro and con in the endgame" aside and leaving just the execution here by the way.
Personally, I am preparing my retreat positions abroad. I have observed the action blockbuster called "cold turkey removal of a country from a trading block" after the dissolution of the Eastern European trading agreements in the 1990es(*). It is a B-movie one does not want to watch from the front row more than once in a lifetime. I watched it once. It's enough. Yes I do not need to see decades in the future as I have seen this cluster*ck a few decades in the past.
By the way, we are already observing the opening sequence - on every UK road. It looks exactly the way Polish, Bulgarian, Romanian, Hungarian and Czech roads looked in the 1990-es. If you have any objection to that you are probably driving a tank (or something similar which does not notice potholes).
(*)It is irrelevant is a trading block good, bad, red or blue. One day you have relationships spanning 20 years with suppliers and customers. The next day you do not and there is no money to pay your workers so you are parking agricultural, industrial, etc machinery on the lawn in front of the parliament asking for money - which they do not have. It is as simple as that.