Explicitly understood, but not documented, not disclosed to the public, and no measures taken to ensure that McKinsey is staying honest and no personnel or info

Explicitly understood, but not documented, not disclosed to the public, and no measures taken to ensure that McKinsey is staying honest and no personnel or information was shared between teams during the 12+ year engagement. No concern that what they got caught for in South Africa might not have been a one-time deal. Just took their word for it and kept their secrets.