To see why, it is worth recalling that the SGP’s original rules were judged “stupid” by one former Commission president (Romano Prodi), because the single-minded pursuit of a deficit below 3 % of GDP could be inappropriate during recessions. That argument was accepted, and the SGP was supposedly rendered more “intelligent” by, for example, permitting budget deficits to be adjusted for the economic cycle, adding medium-term objectives for expenditure, and introducing escape clauses.
要想明白原因，不妨回忆一下，SGP的最初规则被一位前主席（罗曼诺·普罗迪（Romano Prodi））称为“愚蠢”，因为一根筋地追求赤字低于GDP的3%可能在衰退时期并不合适。这一批评被接受，SGP大概也因为（比如）允许预算赤字根据经济周期调整、添加支出的中期目标以及引入豁免条款而被认为变得更“聪明”了。