Derek Thompson unearths a point from Bruce Bartlett's chat with Ezra Klein earlier this summer:
Suppose you had a 10 percent VAT and we said we weren't going to collect it for the next 10 months. People would buy like crazy. They'd buy toilet paper, they'd buy anything they could get their hands on that they knew they'd need in the future. We're depriving ourselves of a great stimulant tool by ignoring this.