The white-collar bar is a varied and wonderful thing.
On one hand, there are the large-firm players — the FCPA mongers and the folks doing criminal antitrust work who fly all over the globe representing clients in lucrative conference room litigation that will rarely see a courtroom.
These cases are well-funded. Even if the client has a higher chance of French kissing the Chief Justice during the State of the Union address than of being indicted, as long as he’s indemnified by a large company, many firms will do everything they possibly can to be completely and fully ready for an indictment that will never come. I haven’t yet heard of a mock jury for a client in an investigation that isn’t going to be indicted, but I think that’s only because no one has thought it up yet. (And, to my friends currently representing such indemnified clients, you’re very welcome for the suggestion.)
For these folks, attorney-client privilege exists and is relatively easy to preserve. It’s good to be pre-indictment and it’s good to be indemnified.
But, for the rest of the folks accused of white-collar crimes, our Department of Justice is only too happy to make folks choose between a preserved attorney-client privilege and the Sixth Amendment.