You might be surprised. Jeff Bezos has a similar system in place, and it seems to be holding up to Amazon scale. Something slipping through the cracks is a failure of process, and failures of process are exactly what a CEO wants to be paying attention to. While I imagine the "actually gets read by Bezos" claim is just PR, these sorts of emails actually do get read by people who have power and influence, and the interesting ones do actually end up in front of Bezos long enough for him to forward them to someone he suspects is responsible.
https://www.inc.com/business-insider/amazon-founder-ceo-jeff...