There was a detailed story in the Washington Post on Nov 20, 2003, that mentions Slocombe's role in this decision as well. As the story said:
The demobilization decision appears to have originated largely with Walter B. Slocombe, a former undersecretary of defense appointed to oversee Iraqi security forces. He believed strongly in the need to disband the army and felt that vanquished soldiers should not expect to be paid a continuing salary. He said he developed the policy in discussions with Bremer, Feith and Deputy Defense Secretary Paul D. Wolfowitz.
"This is not something that was dreamed up by somebody at the last minute and done at the insistence of the people in Baghdad. It was discussed," Slocombe said. "The critical point was that nobody argued that we shouldn't do this."
Slocombe recalled discussing the issue with Wolfowitz on May 8 and with Feith several times, including on May 22, the night before Bremer issued the formal order. Trying to put the army back together at that point, he said, "would've been a practical disaster."
And doesn't it almost seem inevitable that any such epic screwup would, somewhere along the line, have to have involved frickin' Wolfowitz and Feith? Why couldn't they have been insurance brokers, tap dancers, rodeo clowns, crop duster pilots or something like that? Why did they have to become government policy makers? The world could have been so much better off . . .