https://www.nytimes.com/2018/11/03/opinion/midterm-election-...
I can't help but think, if private equity already controls the industry, that there is ample room for a startup or non profit or even a government owned business to disrupt the industry. Create real secure optical scan voting machines based on the best practices that have been come up with, and with independent audits and sell them with a contract where the machines are updated with security fixes for a fixed period.
Sell the machines a bit like razors, The machines themselves are relatively cheap, but come with a required subscription to the security fixes for the lifetime of the machine.