You invite coercion and retaliation when ballots aren't secret. Corruption can and does happen in either case, but we don't need to enable other bad behaviors. Transparency and sunshine laws are not a panacea.
Verifying an election process is one thing. If you're saying that if we can verify an election, and it can still be corrupted by criminals, so be it. All the more reason to end the farce. Sticking our head in the sand in pretending it's viable is not reasonable, and is perilous.