I think IBM bought an Irish company that did similar work in the UK, so it probably looked achievable, and a potential Cash cow for other states. (Accenture was able to sell child welfare solutions at great profit in the 90s) Its a great business as it generates alotmof complimentary sales and services.
In the 90s that would have been Andersen Consulting rather than Accenture. Although having worked with them at the time and found them worse in every way than IBM is described in this thread, I wouldn't be surprised to learn they profited at the expense of poor children.
It's a frustrating place to be put in charge of for a political appointee charged with reform, usually without alot of knowledge, or with a idealogical bent fueled by conservative dogma in this case.
IGS is a shitshow, but outsourcing stuff like this is ridiculously dumb. IBM was in a position where failure was the only option, and anyone attempting to do this will fail. IBM underestimated the difficulty of the task, probably because the customer had zero clue.