The issue is verification - how do you verify the elctronic count was accurate?
And if you're going to manually count it to verify the electronic count, then why have the electronic count in the first place?
A small, statistically representative sample of the paper ballots are counted by hand and compared against the electronic count. If discrepancy arises, a more thorough audit is performed.
Interesting, makes sense. Is this actually the recommended resolution process by the vendors as well or is this something that needs to be approved and adopted by each voting precinct?
Spot checks are good enough in such a case; if you manually count 1% of the votes and the margin of error is negligible, the electronic count is sound. If there's too many errors / differences, stop using the electronic counting and just count by hand.