"Know less" seems generous:

'The Big Con of the book’s title is not a crime; it’s a confidence trick. Consultancies and outsourcers, Mazzucato argues, know less than they claim, cost more than they seem to, and — over the long term — prevent the public sector developing in-house capabilities.'

https://www.ft.com/content/fb1254dd-a011-44cc-bde9-a434e5a09fb4