cure inflation
this very targeted purpose perhaps missed the greater use of such a mark up market 
to socially control the changes in the price level
greece today needs such a social mechanism design
to allow orderly reduction of its relative price level within the euro zone 
compared to its "partner systems "
the national economy can not adjust its trade balance by a simple if grave deval
the system is multinational
at the same time greece devals germany a major surplus trader vis a vis greece
 must  virtually reval ...not possible eh ??
within  a unified currency zone 
so it has to come thru relative rates of change in either  import absorption or price level moves 
now forex allows a very precise adjustment to a trade imbalance by 
incentivizing a rise in  import prices and a lowering  of export prices on trade able products 
ie getting the substitution effect working 
while leaving non trade ables "as is "  at least in terms of  their own  va 
the price level mechanism however can by broader means  get the system the real system to the same place