Minor nitpick: big 3 strategy consultants (MBB: McKinsey Boston Bain), big 4 auditors (Deloitte, PwC, EY, KPMG). Big 4 also does strategy consulting but they ar

Minor nitpick: big 3 strategy consultants (MBB: McKinsey Boston Bain), big 4 auditors (Deloitte, PwC, EY, KPMG). Big 4 also does strategy consulting but they are not the prototypical executive immunity sellers. Big 4 typically has more down to earth / implementation experience due to commanding lower prices and thus ability to stick for longer in a sustainable way (what you complain about). Disclaimer: I have worked a lot on at least one of those 7.