a theory developed by supply-side economist Arthur Laffer to show the relationship between tax rates and the amount of tax revenue collected by governments (a typically conservative theory that believes that too much taxation will depress business investment)
the so-called 'Laffer curve', evoked by free-market advocates as a reason against excessive taxation
I first encountered this in an earlier book but I guess I didn't add it to Bookmarker. he defines it later on, and goes into what's wrong with the theory (i.e., proceeds of taxation creating conditions appropriate for business, plus taxation money itself being spent on private business)