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I think that goes along with what the parent mentioned. If someone can prove how they voted, then Person A can buy Person B's vote and request proof that Person B voted that way. However, if Person B can't prove which way they voted and it is just based off trust then Person B can lie and still vote however they'd like.

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You can do that today. You could have sold your vote in the 2016 election. It just doesn't seem to be a thing people do.

How can you do that today? Can you get the equivalent of a receipt from voting?

One possibility that comes to mind is filling out a vote-by-mail ballot and letting them verify and send it in.

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