Neither Proof of Work nor Proof of State would actually help. A human can always choose to operate based upon a script. All it shows is that a human signed off

Neither Proof of Work nor Proof of State would actually help. A human can always choose to operate based upon a script. All it shows is that a human signed off on it at some point. Removing privacy wouldn't help matters either. /At best/ you would get chilling effects combined with warmed over classism as the poorer are the most likely to be tempted into selling their certs and therefore "poor = shill".