I'm confident they don't just pay someone if their data is inconsistent; the database is not the only source of truth. The next question then becomes, how much

I'm confident they don't just pay someone if their data is inconsistent; the database is not the only source of truth. The next question then becomes, how much does it cost to fix these inconsistencies? I'm also 99% confident that there's a small army of people that work to do so already, that is, fix and work with and around the inconsistencies.