> McKinsey also advised Purdue and Endo on how to target the U.S. Department of Veterans Affairs for sales of their products, according to documents made public through the firm’s settlements with state and local governments. This advisory work occurred while McKinsey was simultaneously working as a consultant for the VA itself. McKinsey has said that it advised the VA on matters unrelated to opioid procurement.
Conflicts of interest are rife in utilising these consulting companies for government services.
Australia has an ongoing saga with a similar theme[1], where a consulting company, PwC, played both sides to the advantage of corporate friends, and got caught.
[1] https://en.wikipedia.org/wiki/PwC_tax_scandal