It seems reliance on electronic pay is a big vulnerability, whenever there's a hickup everything stops. You can make the systems work reasonably well but there

It seems reliance on electronic pay is a big vulnerability, whenever there's a hickup everything stops. You can make the systems work reasonably well but there will be an outage eventually. In any kind of cyber battle you'd think this would be a huge problem. In the US I noticed most young people also carry little cash, while I'm often paying with cash. I know in China they also like ubiquitous tracking of people, and maybe the us govt would like that too.