[mr_toad]

Without those data inconsistencies to fix up every week, Joe would probably be out of a job.

[ethbro]

But Joe typically hates dealing with the inconsistencies, and he can tell you exactly how they could be fixed.

It generally seems like (a) the suggestions for fixes are impractical to implement (overly detrimental effect on counterparty), (b) Joe isn't empowered organizationally to suggest fixes that will be implemented, or (c) Joe doesn't have access to the IT tools to implement fixes himself.

[mr_toad]

From my experience the answer is usually (d) all of the above.

[jackfoxy]

A little bit of (a), but mostly (b)