And if the others do not do this, they also become responsible for such non-compliance. This was the political motivation for establishing the SGP. EU Member States, their governments and citizens, do not seem to be fully aware of such a sharing of responsibility.
As Mario Monti recently put it, governments are too polite to each other, maybe in the expectation that if they find themselves being accused of the same transgressions one day, they would then benefit from the forgiveness of the others.