Here's a counter-point. A cashless society enables dominant private parties and government to introduce friction when and where they chose. "Your payment cann

Here's a counter-point. A cashless society enables dominant private parties and government to introduce friction when and where they chose. "Your payment cannot be processed." We saw this recently with the Wikileaks contributions embargo. We've seen it codified in legislation such as (but not solely) SOPA. So... it may be very convenient to swipe, bump, (grind?), whatever... until it isn't. I'm certainly not the only person to think of this, In any number of otherwise insightful science fiction stories, cash lives on -- sometimes as a black-market economy, but not only for nefarious activities.