Are you sure he's not playing a part per the Q plan? The plan was to show how corrupt the govt is before cleaning it up. Lindsay being in a position of power would need to appear to "go with the flow" of DS accommodation (through inaction, ineffectiveness, fumbles) in order to keep them thinking they are still in control, so they can do all their dastardly deeds for all to see. That show is nearly over. We will soon find out whether he is acting or still a DS fool. Remember Q said "What makes a good movie?" I think the answer is "good actors".