Re: has this actually raised any more tax?
Yep, see my reply to another post.
I am engaged at a gov dept, on a rate 40% higher than previously (when it was outside IR35). 40% -> HMRC -> Gov dept -> Contractor bill.
It's bean-counter misdirection, but they can brag about it to the press and the public with nice headline figures.
The 'increased rate' arrangement works to some extent, but it rankles that I now have to pay £1000/month from post-tax income on travel and accommodation - not something an employee engaged directly by the end-client would ever need to do.