The volatility of public revenue is already now twice that of larger, more diversified economies such as Germany of France. The illusion of the balanced public budget has to be seen against the background of the depletion of budget reserves and even the occurrence of deficits during the last economic turn-down.
The low debt level would only bring temporary relief, but acts as an encouragement to delay action. The currently favourable situation of the pension regime seems to encourage complacency rather than to be seen as a window of opportunity to set aside large assets.