I'm not sure if there's a way to make forging work. You can't forge a new ballot, because ballot IDs are necessarily public, and are cryptographically tied to

I'm not sure if there's a way to make forging work. You can't forge a new ballot, because ballot IDs are necessarily public, and are cryptographically tied to a voter ID in order to ensure votes are valid and that everybody only votes once. But it seems like nothing is stopping you from looking up ballots at random until you find the votes you want, and then claiming that was your vote. And if someone else got paid for the same one, then claim they're the one lying, not you?