Medicare for all summed up in one graphic:
What you are missing is the X factor. You have no idea what is being subsidized by me, the tax payer {which I don't begrudge you or my son, a retired Navy Captain, for your years of service}.
Medicare is a bad program in that it pays for services at such a low rate, that many refuse to participate, and most seniors use an advantage plan or a supplemental plan.
Remember, medicare was supposed to kick in after retirement and a lifetime of co-payments by employee and employeer {all of which was paid by the employee} and was never intended for the whole population.
It has been corrupted by medicade, which is now a "free for all", and a main reason the health care insurance business is such a mess.
On top of it all, is the canard, that most people have been conditioned to believe that HEALTH CARE INSURANCE IS A RIGHT, which is pure bullshit.
It is a service, which if you pay for, the company has a obligation to honor their contract. Period.