If Q has it all, then Q knows who is ordering these shootings and everyone involved. Why is it being allowed?
If you carry out treasonous orders from your boss, you should be fucked. No exceptions. There is no double agent after the fact and taking money for it via wife. Testifying should get him a private hanging instead of public and that is all.
It is supposed to anger people so much when they realize they have been played, they either go on a murderous rampage or collapse in despair. Either works for what is coming and has been planned.