That's a wickedly accurate article, Howabout. Brexitshire here too.
You're right, Scary; the quickest and most effective way to change the culture would be to start with the fast-trackers and upper echelons and to my mind, the first step would be to remove the sense of entitlement. There are a number of ways in which this could and should be done but I'm sure Dmitri already has a list. (Although if he is short of ideas, which would be uncharacteristic, I've got a few he might like).
Virtual immunity from sacking is the biggest problem. There is a procedure but it is so long-winded and tortuous that you would need about two years and a huge chunk of close managerial attention to achieve it. The easier option is to sideways transfer or, in cases where the civil servant is an old hand at conjuring up time-wasting and essentially frivolous grievances, to promote and transfer at the same time. Peter's Principle is in evidence everywhere. Lack of competence or even any basic sort of working knowledge in the relevant area is no bar to being a project leader. And it has always been easy to suffocate good ideas under a plethora of process so that they eventually wither and die.
If the Civil Service is to be made fit for the 21st century, it needs a disruptor. One with powerful backing.
Fortunately, it has found one 
I expect HM Forces will be delighted at an MOD Civil service shake up. There was one in particular who was disliked across the board and groans went up every time she set foot in Brussels. She had no idea, nor did she want to, of how HM Forces actually functioned.
I'm fairly sure I worked with her identical twin. A fast-tracker who did the obligatory six-month stint in uniform as a prison officer "to learn the ropes" before going straight to governor grade. She told me that on her last day of duty in her previous establishment, her uniformed colleagues stood on the top landing and emptied a bucket of slops over her head as she was leaving for good. "It was a sign of respect, that they had finally accepted me", she said proudly.
No, chuck, it wasn't, it really wasn't. It was certainly a sign of something but, trust me, it wasn't respect.
Megan. I expect his valet was having a day off.