I worked designing ballot reading machines back in the late 80's. I enjoyed the work and we made some great equipment. Then the "hanging chad" incident came along and the Federal Elections Commission issued strict certification standards for ballot counting equipment. Once my company certified the machines that they sold, they ended all R&D and new product development. It was not possible to make incremental improvements without a massive retest and recertification, and the company (correctly) surmised that the certification costs would limit the playing field to the existing players.
So, no incentive to build better machines.