Without a root of trust though, how much good is that? When I needed a copy of my birth certificate to get a CA driver's license, I just sent my home state $10-$20 and pinky promised that I was me. Getting utility bills or whatever delivered to your favorite name isn't hard either. It's cheap and easy to bootstrap your way into somebody's identity.

Maybe the payout isn't worth it, but (a) empirically, people seem to be willing to spend a lot more than that per vote if necessary, and (b) it's not substantially harder or riskier to do that than to risk prison voting for a dead person or whatever else some fraudster might cook up; if we think this is an important system which people are trying to rig then the proposed cure just keeps honest people honest.