[mspecter]

To put this in short-hand: "We bank online, we buy all sorts of stuff online, why not vote?"

The biggest reason is that banking and other financial transactions have a very different threat model from voting.

In particular, voting requires a secret ballot. In addition to preventing an adversary from learning how you voted, a secret ballot requires you to be unable to prove how you voted, to prevent vote selling and coercion.

So, unlike financial transactions, how you do validation / remediation of failures is very unclear. Ben Adida has a blog post with further thoughts here (https://benlog.com/2007/03/02/on-voting-banking-and-bad-anal...).

[micimize]

Hmm, I hadn't fully grokked the facet of the problem domain. I guess you could give users a spoofing mode, that allowed them to fake any ballot / action. Or possibly, if there was a window of time in which they could change their ballot freely.

Maybe making such features both secure and accessible would be nearly impossible though.