The number is extreme... but it's worth noting that Facebook and Google both manage more users, often with more complex information, including people intentiona

The number is extreme... but it's worth noting that Facebook and Google both manage more users, often with more complex information, including people intentionally trying to break and trick their systems - at very low cost. (I'm not sure if Google/FB spend 0.10 per user, but it sure ain't anywhere near $100). I think with a sensibly simplified tax code, and FAANG-level technical innovation, IRS costs could enter that range.