Efficiency in Government Health Care Spending Act - Amends part D (Voluntary Prescription Drug Benefit Program) of title XVIII (Medicare) of the Social Security Act, as added by the Medicare Prescription Drug, Improvement, and Modernization Act of 2003, to repeal the prohibition against the Secretary of Health and Human Services' negotiating with drug manufacturers and pharmacies and Medicare prescription drug plan sponsors concerning the prices of prescription drugs for Medicare beneficiaries.