A brilliant consultant without ethics is a scandal waiting to happen
What you do as a consultant is only valuable if you do it in the right way
. If you want to read about this we recommend the following two documents on the site. The following piece appeared in the HBR and talks about "integrity landmines". This document is one of a set of 6 on the site, which talks about the real life ethical challenges faced by management consultants.
A brilliant consultant without ethics is a scandal waiting to happen