“‘If you care at all about the future of this country, one of the things you need to realize is we need to solve the demand side so we can get back to the supply side issues that are really the tricky thing for the long run,’ he said. ‘The way to solve the demand side issues that is the most consistent with not messing up our supply side is monetary policy and making it so we can have negative interest rates.’ At the moment, e-dollars are still only a theoretical concept, but Kimball is hopeful that they could be put into action in the near future. He believes that if a government bought in, it could be using an electronic currency in three years and reap the benefits of it soon after.”
http://www.businessinsider.com/electronic-currency-2013-11