It's interesting that you point out that you haven't seen it, but you haven't been looking for it. This issue came to light through reports in the media. There have also been efforts undertaken by journalists around the world with respect to McKinsey specifically.
Do you know of, or have you read reports of, some of the other firms you mentioned—PricewaterhouseCoopers, IBM, KPMG—holding corporate retreats within a couple of thousand metres of a concentration camp? Are you familiar with examples of that?