When an inflation target is first put in place, it probably needs to be more rigid in order to gain acceptability and credibility, but as credibility is established, there is more opportunity to let go a bit of slack on inflation variability over time, in order to smooth other variables such as interest rates, exchange rates and output.
There is also a problem of ballooning fiscal deficit after the Lehman shock, which is common to Japan, the United States, and Europe Excessive government debt has been accumulated as there was a weakness in the mechanism of monetary union in the euro area.