voting: economics of paper trails

Isn't it *cheaper* (as well as more accurate) to have preprinted ballots, optically scanned, then to have an embedded computer print out a paper trail? Ie, don't the benefits of volume printing beat the cheapest printing tech? Besides the other advantages of being self-verifiable, more accurate, intuitive, unhackable, not having to be destroyed or randomized (as with serial polling-place-kept paper trails), etc? Methinks the printing press / optical scanner industry is not resisting the Diebold/tech-fetishist whores adequately... I think Ben Franklin would agree.