Problems with voting systems are only visible during close elections. The assumption is that there is error in every system. Figuring a 3% error in voting systems means that any election within 3% will show the problems. The press will magnify them and everyone will be pointing the finger at someone for cheating. All human systems are flawed including voting systems. Some method of verification is essential.

The idea of having the voter receive a paper receipt of their choices is bad. Fake copies will proliferate making the problem worse.