They could care less. At a minimum, said the committee, a lawyer must consider carefully what to say in bills. Counsel should include nothing within the privilege rules. If counsel were to follow this advice, of course, nothing would be left for auditors to read. Nothing can be disclosed without the client's informed consent.
Risks here seem great.
Privileges are not waived piecemeal. Once any part is gone, all privilege is gone. Consequences for clients could be profound. The best course may well be not even to raise the question with the client, but to turn down cases requiring disclosures to auditors. Legal Ethics Comm., Op.