All the things they beg to be free takes someone's time to produce.
It's only fair that if these people have to give their time for free, people wanting free stuff should start by refusing pay for their time.
But they won't because we all know it's all about "give me free" anyway.
It is, if and when throwing more money at the doctors fails to motivate them. At some point you work enough hours that getting paid overtime stops being enticing. So either you find an alternative way to motivate your medical professionals (do it, or else), or compromise on quality.
If we are to claim that healthcare is a human right, it impossible for that to be a right to receive treatment in a hospital from a professional; it would be a right to see to your own treatment. Self-medication, experimentation, medical tourism, "alternative medicine", homeopathy, quackery.