When a store has a video camera and they are robbed, they can use the evidence in the video camera to catch the robber. In this case they can get money back and send that person to jail to prevent future robberies of other people and themselves. But, without the video camera you have no evidence of who your robber was. This causes you to ony lose money and put you at higher risk for being robbed again if the perosn knows they can easily not be caught.
I would say this would classify as a downward comparison as the person is talking about Mark who has a poorer job situation than him and this could be used to bolster the speaker's ego or to knock poor Mark or could just be an observation.
