This sounds nice in theory, but there’s a county in my state which hasn’t had a good count in my lifetime. All the collected ballots still get counted, and because the count doesn’t match a recount can’t be conducted by rule. Once ballots are in the box it’s functionallly impossible to determine illegitimate ones. There’s definitely legitimate mistakes that can cause that, but it’s essentially impossible to prove it was fraud and not losing a few stubs, a missing spoiled ballot, or someone just keeping a ballot that were merely accidental.