It's a good business model, kind of like hiring a flashy hairdresser that gives very expensive but often terrible haircuts - but when people are told that this famous stylist did it, they all just go 'ooooh...'
> His top deputy, Anthony Shorris, and other aides decided to hire a consulting firm. They solicited proposals from firms on a pre-approved list from the previous administration. Despite its lack of corrections experience, McKinsey won the contract.
> The mayor’s office denied that McKinsey was hired partly to provide political or legal cover, as did Shorris, who is now a senior adviser to McKinsey and teaches at Princeton University.
Now that's a reason a deal like this actually makes sense! I give you $27m in taxpayer money, and when I leave, you give me $x in return. That's a deal that makes a lot more sense than paying 24 year old NYU grads to solve big problems with powerpoint and linear regressions.
You have an urgent problem, your stakeholders want change now, but you can get people off your back if you hire McKinsey.
Or, you know what you want to do already, but it’s a big change so you get McKinsey to sign off on it.
If it doesn’t go well you have cover ie we made the best possible decision we could - we hired McKinsey!