And game theory explains why we act even more irresponsibly when making group decisions (owing to the so-called common pool problem). Fiscal deficits, like unwanted pregnancies, are the unintended consequence of actions taken by more than one person who had other objectives in mind.
行为经济学的最新进展表明我们都存在很大的自我控制问题。博弈论则解释了为何我们在做集体决策时会变得更加不负责任（因为所谓的公共池塘问题）。财政赤字就像是计划外怀孕，是一种因为不止一个心怀其他目标的人的行为所造成的意料外后果。缺少财政控制是希腊陷入麻烦的原因。