Why would you want more of a failed system?

According to JAMA, "the frail elderly in the United States receive services that are fragmented, incomplete, inefficient, and ineffective." All of these people are using Medicare, or Medicaid, or both (known as dual eligibles). That's 21% of the Medicare population. If our government is doing such a lousy job with this population group which can't speak for itself, why do we want Obamacare, which is working toward a single payer, universal system for every citizen?