This is an important question.
Yes, McKinsey routinely declines work with clients and we will continue to decline work with clients.
As part of our compliance process, we have a five-layer screen that every potential client has to pass through. If a client doesn't pass through all five screens, we won't take on the work.
Then you might ask the question, what happens if they pass through the screen? Do they still get to work with McKinsey? The answer is no. They have to go through another screen for the actual particular type of work in question, and an independent check and balance on the team that could potentially do the work makes the decision whether that's a piece of work that McKinsey should actually take on.