Could Burke be a frumentarii? He looks a bit like Vulpes when he's in disguise and talks much more formally than most other people. Burke has enough pull with Talon Company to punish them for failure (I think it's in a note on some Talon mercs when he sends a hit out on you). Commiting atrocities (like nuking a town) is something that falls under the frumentarii job description.
Talon Company's goal is to keep the Captial Wasteland disorganized and unstable. We never find out who they work for, but I think it's plausible that if Burke is a Legion spy that he's hired Talon company to keep the CW unstable so they'll be weak for an eventual invasion by the Legion.
I understand that this is very unlikely seeing as the CW is far far away, from the eastern edge of Legion territory and in 2277 the first battle of Hoover Dam was keeping Legion busy.
Thoughts on this anyone?