If fiscal policy is eased, it must also be tightened at a later stage; otherwise it will not be possible to maintain the long-term targets for the development in public finances. The reflections on the sustainability of public finances in the consultation paper emphasise this need for subsequent fiscal-policy adjustment.
In order to be sustainable, public finances must comply with a budgetary restriction to the effect that future government revenue must match the current government debt and future government expenditure. Such a restriction means than any budgetary relaxation must subsequently be counterbalanced by a tightening. BIS Review 33/2004  1