"The Subcommittee’s investigation of food service contracts has revealed systemic deficiencies in the transparency and oversight of contractors’ rebate and discount policies. Chairman McCaskill asked Office of Management and Budget Director Zients to review the Subcommittee’s findings and issue guidance to federal agencies to address these deficiencies. She also requested that OMB consider how the federal government can better leverage its buying power through the strategic sourcing of food service."
See it at hsgac.senate.gov. (The letter is on the upper left of the linked page in a pdf document.)