I'll preface this by saying I have never practiced medicine in the UK. Most of what I know comes from working with the Scottish NHS in setting up trial PA programs there.
Here is a page on the pay scale:
http://www.nhscareers.nhs.uk/details/Default.aspx?Id=553
Top pay for a consultant does approach $200k. Also a private GP in a good area that is forced to take their own call can approach that. I am guessing that most of the anesthesiologists in private practice are doing better than that.
You are right no billing or malpractice. Now the bad part. First of all if you want to specialize there are a limited number of positions. You have to progress through the ranks. Yes you make $100k in specialist training, but that is where you will sit for a potentially very long time. You also have to consider the cost of living.
The other issue that you don't talk about is rationing. Now the NHS claims there is no rationing, there is defacto rationing due to differing rules. Over 70 - no dialysis for you. BMI over 30 no total joints. Want to prescribe an expensive medication - trust won't pay for it. Need a CT or MRI - prepare to wait.
Its kind of the same reason that every physician in the US doesn't work for Kaiser. You can make the same money that you mentioned above with the same hours working for Kaiser - If you accept the limitations.
David Carpenter, PA-C