Medicare provides a critical healthcare safety net to tens of millions of American seniors, but the program’s costs are soaring as more baby boomers sign up and healthcare gets more complex, and that’s got Washington, D.C., lawmakers trying to come up with fixes to keep the program on solid financial footing. Unfortunately, these fixes could cause significant changes to Medicare that impact choice and cost sharing and, unsurprisingly, that’s drawn the ire of budget-conscious seniors, and organizations, including AARP, that advocate for them.