Krugman thinks we should pay our bills with moral obligation chits. On the premise that money is any
one thing people think is money, then file this one under "not as crazy as it sounds" (and not as serious as this guy seems to think it is). For added dignity, we could have them incised on giant pieces of stone, like they do on the Isle of Yap (copper, like they used to use in Sweden, is probably too expensive). Or we could just dragoon all the lower-level treasury minions and send them to Safeway.