The only person deeply involved in Haskell at MSR Cambridge was Simon Peyton Jones. And he was Senior Principal Reserarcher. You can look up the total compensation for that level on public salary sharing websites yourself. You are off at least by a factor of 5.

I see. Although, for Cambridge, UK, I might be off by a factor of 2 at most, I believe.

nb spj has left MS Research: https://discourse.haskell.org/t/new-horizons-for-spj/3099

Doesn’t Microsoft research pay top dollar ?

Do they have side income based on their leadership of GHC?