If too loose, a rule is merely ornamental. If too tight – a constitutional amendment requiring a balanced budget, for example – the rule could create rather than solve problems: think of the economic and political chaos that would ensue if Spain, with unemployment at 21%, were forced to eliminate its huge fiscal deficit overnight.
但并非所有的财政规则都是一样的。如果规则太松，则会沦为皇帝的外衣。如果太紧（比如用宪法修正案的形式规定预算必须平衡），则财政规则就会带来问题，而不是解决问题：想想看，如果失业率高达21%的西班牙被迫在一夜之间消除其巨大的财政赤字，会造成怎样的经济和政治混乱。