> This is why I would recommend that the bank's systems be used as a base. They've been battle-tested. Basically, the question is one of "How can we rebuild the wheel?", which is stupid.

Not quite. If a bank's system eats $4000 from your account, you have deposit slips, checks, and bank statements that the bank can use to recreate your account history. And, if you discover the problem 10 days late, the bank still can fix it.

In an election, there can be no mistakes from the software. And, if you find out later that there were errors, there is a lot more at stake, and a lot that can't be reconstructed. Bank systems might be a good model to look at for ideas about handling redundancy and implementing detailed logging, but voting systems are a separate problem.