How does that work though? What's the root of trust identifying me as me to a government who, at most, has a written record somewhere of my birth, and definitely not enough information to tie that to any particular face or body.
Nearly every nation on earth does this. It's nothing new. We have the technology and the means. This isn't a problem.
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.