Those who can do, do.
Those who can’t, teach.
Those who can’t teach, become politicians.
PB was with McKinsey for only three years. I honestly don’t understand how he could survive as a viable consultant even for that brief period of time. Most consultancies expect you to pull your own weight and grow the engagements. He just doesn’t exhibit any kind of expertise in anything. He’s lighter than air and a total BS artist.