re: U.S. Agencies Told To Share Financial Systems
I would suggest OMB relook the experience of DoD. In 1991, DoD consolidated over 300 different offices to 10 (or so) and directed all DoD monthly pay came from the Defense Finance and Accounting Services (DFAS) and not from the many OSD and Service offices by 'date x'. Before this, the Services had a long list of why it couldn't be done.
OMB's proposal to wait until a system is modernized is a mistake - Agencies will forever 'maintain' and not 'modernize'. But, if the Administration would convert the DFAS to a Federal Finance and Services agency, and (the most important step) establish a schedule of closure for the many Agency systems (which is the DoD experience), the Administration would get the efficiencies and savings sought.