“His chief of staff is Colonel Sebastian Moran, as aloof and guarded and inaccessible to the law as himself. What do you think he pays him?”
“I’d like to hear.”
“Six thousand a year. That’s paying for brains, you see — the American business principle. I learned that detail quite by chance. It’s more than the Prime Minister gets. That gives you an idea of Moriarty’s gains and of the scale on which he works.”-- Arthur Conan Doyle Valley of Fear
(this is a bit hard to get a straight answer on since inflation is a bit tricky for the time frame. I've seen from
£1 (2011) = £65.54 (1915) to £1 (2010) = £86 (1915)
We're going with the first as it seems to be the historic standard of living value of [] income or wealth.
As a side note, "Average annual earnings, allowing for unemployment and overtime, for all wage-earners in the United Kingdom (excluding shop assistants), men, women, boys and girls, are estimated at £51 in 1913 (Change in Distribution of National Income, Bowley, 1920, p. 13); average family earnings were probably between £95 and £100 annually")
Roughly, Sebastian would be making about £393,240 a year by today's standards but theoretically even higher.
The Prime Minister makes roughly £187,000 a year.
***I'm not an economist and I'm terrible at maths. If you have a better conversion, please let me know.