I wonder how much this actually matters? I understand that for an auditor, having a quality reputation matters. But if all audits from all firms are bad, how much would the world economy suffer?
Likewise for the legal profession, if all judges made twice the number of mistakes, how much would the world suffer?
At the end of the day it is a question of convenience/standards, if GAAP didn't exist maybe firms could use a modified accrual standard that is wholly compliant with tax reporting and that's it.
Is this hyperbole? It seems like the real question being asked here is "would the world be worse off without deterministic checks and balances", which I think most people would agree is true, no?
From that perspective, lowering the quality of something that is already non-rigourous might not have any perceivable effect. It’s only a problem if public perception lowers, but that’s a marketing issue that the big-4 already have a handle on.