Welcome to inflation, where your dollar is worth less as the days go by...
Well the $5 footlong deal happened because of the 2008 recession, not necessarily by inflation itself (though it can be still considered as a factor in the long-run).
Welcome to inflation, where your dollar is worth less as the days go by...
It's either that or an expiring currency with demurrage fees, which is effectively a more direct (and less free market?) way of taxing holding onto money. And the latter only works if people stick to one currency, which is not likely to happen in this age. (You tax muh monies? I'll use gold, or Canuck dollars, or bitcoins instead!)