In many large companies, there are non-aggression pacts. “I don’t air your dirty laundry so you don’t air mine.”
The best consultants comment on the Emperor’s wardrobe, or lack thereof. And they do it in a way that makes everyone pleased that the logjam is released. And they can only get away with it by being temporary.
And for all the complaining of consultant bill rates, independent consultants have a lot of overhead to cover. (Sales, taxes, insurance, downtime, legal…)