Alright, my ass is officially chapped... While Nancy Pelosi rightfully characterizes Republican plans to raise the Medicare age as taking a "scalp" rather than seeking a solution, she totally blows it when it comes to proposing the real solution to problems with Medicare. You want to fix Medicare? Drop the age requirement entirely.
The very concept of insurance depends on "pooling" risk. Insurance carriers collect the premiums of their "insureds" and aggregate the funds to allow them to pay off any claims incurred by insured entities. While riskier "insureds" typically pay higher premiums, these higher premiums are insufficient to pay off claims, therefore, the premiums paid by less risky "insureds" form the bulk of the funds used to pay claims. In the case of health insurance, older persons, in the aggregate, tend to have more health problems than younger persons, and those problems tend to be more chronic. In the U.S., younger, healthier persons tend to be covered by private insurance policies through their (or, increasingly, their parents', thanks to Obamacare) employers. Older, generally sicker, persons and disabled persons are covered by Medicare, while indigent and disabled persons (who tend to have worse health outcomes than middle class and wealthy individuals) are covered by Medicaid. Generally speaking, young healthy persons pay premiums to for-profit health insurance companies while older, sicker persons receive benefits from Medicare... a clear case of "privatize the profits, socialize the losses". By dropping the age requirement altogether, by instituting "Medicare for all", insured persons will pay into the system while they are young and healthy, thus bolstering the system in preparation for a future in which they may very well be old and sick. Raising the age of Medicare eligibility would only compound the existing problems with the system, which is why Republicans are proposing it.
Also, the idiotic Medicare Part D provisions that disallow price negotiations with drug companies need to be dropped yesterday. Yeah, the GOP congress passed provisions that hamstrung the buying power of the Medicare administrators in a blatant giveaway to the pharmaceutical industry. They clearly demonstrated that they have no desire to keep Medicare costs down, why buy into their framing of the Medicare debate at all?