It's likely that the subject of overwriting accounts has been discussed with business more than once, but the business are so stupid that they do not see it as

It's likely that the subject of overwriting accounts has been discussed with business more than once, but the business are so stupid that they do not see it as a problem, or think that if anything goes wrong (as it inevitably will) they will loose their pension. So nothing changes. All software companies have an expiry date and Microsoft is a couple of decades past its own.