In those old black-and-white movies, when the immigrants' wagons were surrounded by hostile Indians, and all hope seemed lost, the US cavalry would always arrive, just in time. So now, just when deflationary forces are gathering momentum again, the United States and the United Kingdom have apparently decided to go to war in the Middle East, adding another few hundred billion dollars to the huge increases in public spending already in train in both countries. But this campaign will only do the