FWIW I don't think companies are allowed to purchase consulting services from their auditor, specifically because of this conflict of interest. In my experience

FWIW I don't think companies are allowed to purchase consulting services from their auditor, specifically because of this conflict of interest. In my experience, companies will have one of the big four as their primary auditor, than use some combination of the other three for consulting (in addition to MBB or any other firms). In no way defending the value of these services though - their primary function is to shift culpability off of the executives IMO