If you work on the assumption that your post is going to rouse ire in someone, you'll probably be right most of the time.
Again, evidence? Still waiting for that evidence on lack of impartiality in the CS. Please feel free to post some.
I'm not, at least at the moment, offering evidence, I posed a question instead.
Hard evidence in a case like this would anyway, I suspect, be hard to find and easy to deflect, and would realistically require an inquiry of the kind that I mentioned upstream in regard of Windrush. The CS is certainly a closed, deeply layered, hierarchical set of institutions, which like all bureaucracies, create complexities that self-protect those institutions, making them impenetrable to the executive, let alone ordinary mortals such as myself. There is ample evidence out there to show that they are not efficient - defence procurement, education, disastrous NHS IT failures, I'm sure the list is endless, and yes, I know they are subject to continual political interference, but there is a widespread sense that they are long overdue for reform. Indeed, successive governments have attempted unsuccesfully to do so, so deep are the foundations of the CS's defensive bunkers.
As regards the EU and brexit, the EU has for a long time presented a pretty seamless career path for civil servants, and the Berlaymont and Whitehall are considered to be nicely embedded within each other. So you have, for example, Treasury projections based on partial data inputs, and very sharp CS officials such as Olly Robbins and his loquacious predecessor, who purport to be working for the government when they are really working to water brexit down, preferably to the point not actually leaving, or in the worst case, BRINO.
Hard evidence? You an insider, so you know just how difficult that would be to acquire.
Incidentally, if you are a civil servant, how come you are able to spend time posting onto pfm during the working day? I pay your salary, get back to bleedin' work!