The Committee for a Responsible Federal Budget pointed this out:
This is an area where actually negotiating better deals could make a huge difference without affecting care.Compared to last year's budget, the focus on controlling Medicare costs is especially important – and the Medicare policies in the budget would all achieve savings by improving efficiency and value of care rather than cutting benefits for beneficiaries.
Fortunately, when it comes to Medicare, it is possible to save hundreds of billions of dollars without cutting benefits. In testimony to the House Energy & Commerce Committee, CRFB's senior policy director argued that Medicare reform should begin by pursuing "cost benders" that reform the health care system and thus reduce costs (and often improve quality) for individuals and the Medicare program alike. In general, these changes improve the health care system – they do not cut benefits. The Medicare Payment Advisory Commission (MedPAC) and others have identified many other areas where eliminating or reducing unnecessary payments and subsidies could reduce costs without significantly harming access or quality. Similar savings can come from prescription drugs – as recently suggested by Office of Management and Budget Director Mick Mulvaney.