Comment by ThePadawan

I unfortunately cannot second this - I went to college with a colleague who went on to work at McKinsey, and who I worked with on a project after he left them.

At this point in his career, 3 years after his PhD, he was unable to do anything except put on cufflinks and produce 120-slide Powerpoint presentations that went 30min overtime like he was working for the DoD.

It was an incredibly saddening sight. I talked to him about this and he was 100% convinced that he was doing his absolute top work by having pointless meeting after pointless meeting talking about nothing at all at great length.

The mindset of charging the maximum number of hours for minimal output is really hard to break out of. You can take the man out of McKinsey, but you can't take McKinsey out of the man.