I used to be friends with a guy like that. Who pretended to be a loyal 'salt of the earth' type but would actually sell his own grand-parents up the river if he could somehow secretly benefit from it. He's a policeman now. We're no longer acquainted. He even looks a bit like Burke, with the brown hair and that. Burke's death seemed even more like natural justice because he reminded me of this guy. I agree it could have been more brutal.
Although I found him a pretty interesting character I must admit that I was quite satisfied to see Agent Ward finally get his comeuppance in Agents Of Shield. That guy just did have it coming.