A few days ago there was an article [1] posted here [2] about negative interest rates:-
As long as paper money is available as an alternative for
customers who want to withdraw their deposits, there’s a
limit to how low central banks can push rates. At some
point it becomes cost-effective to rent a warehouse for
your billions in cash and hire armed guards to protect
it.
[...]
Bank notes, as an alternate storehouse of value, are a
constraint on central banks’ power. “We view this
constraint as undesirable,” Citigroup Global Chief
Economist Willem Buiter and a colleague, economist
Ebrahim Rahbari, wrote in an April 8 research piece. They
laid out three ways that central banks could foil cash
hoarders: One, abolish paper money. Two, tax paper money.
Three, sever the link between paper money and central
bank reserves.
Of course, inflation already serves as a tax on savings, so this isn't as radical as it sounds if governments really want to discourage saving.[1] http://www.bloomberg.com/news/articles/2015-04-23/negative-i... [2] https://news.ycombinator.com/item?id=9496568