On the left, a preoccupation with Keynesian stimulus reflects a misunderstanding of both the availability of measures (shovel-ready projects) and their desirability (whether they will meaningfully change the expectations of households and businesses). Indeed, to counteract the mindset forged in the recent financial crisis, spending measures will need to be longer-lasting if they are to raise expectations of future growth and thus stimulate current investment and hiring.
但这一跨党派共识需要克服左翼和右翼的意识形态障碍，至少暂时是如此。左翼眼里只有凯恩斯主义刺激，这反映出对措施的可实施性（万事俱备的工程）和合意性（是否能对家庭和企业期望产生有意义的影响）的误解。事实上，为了抵消源自最近金融危机的思维，要想提高未来增长预期从而刺激当前投资和就业，支出措施需要继续持续下去。