This article does a nice job of summarizing this situation we are moving towards - that is, a "cashless society". In full below from Washington's Blog:
Martin Armstrong summarizes the headway being made to ban cash, and argues that the goal of those pushing a cashless society is to prevent bank runs … and increase their control:
In Greece a drastic reduction in cash is also being discussed in light of the economic crisis. Now any bill over €70 should be payable only by check or credit card – it will be illegal to pay in cash. The German Baader Bank founded in Munich expects formally to abolish the cash to enforce negative interest rates on accounts that is really taxation on whatever money you still have left after taxes.
Complete abolition of cash threatens our very freedom and rights of citizens in so many areas.
Paper currency is indeed the check against negative interest rates. We need only look to Switzerland to prove that theory. Any attempt to impose say a 5% negative interest rates (tax) would lead to an unimaginably massive flight into cash. This was already demonstrated recently by the example of Swiss pension funds, which withdrew their money from the bank in a big way and now store it in vaults in cash in order to escape the financial repression. People will act in their own self-interest and negative interest rates are likely to reduce the sales of government bonds and set off a bank run as long as paper money exists.