pitfalls, a con then. So a devil's advocate argument against it.
Maybe an argument against taking "medicare for all" as an accurate description of the legislative process. As in, a candidate who says "I'm for Medicare for all" who has a bunch of cheering sycophants that don't have the first clue what he even means by it may not be the best way to forward it...especially if said candidate also gives no indication that he has any idea what he means by it either. That you could accuse me of, because we all know I don't think very highly of Sanders. However, since I am in favor of healthcare reform just assuming I am arguing against "Medicare for all" as a general guideline to a solution is unwarranted.
Most of my participation in this thread has been "these are arguments we need to overcome to get this done." Most Sanders supporters appear to believe that "elect Bernie and he waves his magic wand" is how things work, but the truth is that anyone in congress that is willing to sacrifice their career for healthcare reform already did and got shelled out of office for it in 2010. So whatever Sanders means when he yells "Medicare for all" and his crowds go wild, it is going to be a very tough sell.
As to the specific "argument against M4A" that you are gnashing your teeth about...people who
already think that there is far too much easily garnered graft in the Medicare system as it already exists are going to
demand that their elected officials do something about that either before or during the expansion of the system to encompass "all." Currently, no one is really all that sure who to blame for that corruption. Medicare has been around so long that flaws in the structure aren't automatically assigned as "Democrats built in loopholes for their supporters," plus there's a sense that the GOP theory of "deregulation is always the answer" may be why no one is available to catch the corrupt. But it is a rock solid guarantee that if we elect enough democrats (again) to accomplish health care reform (again) and it is flawed (again) those flaws will haunt democrats for a generation (again).
So, yeah, I'm concerned if solving the known problems with Medicare isn't part of this expansion. My mom's former "doctor" is totally corrupt. She doesn't in any way practice actual medicine, and she has one of the most profitable practices in town. I have not the slightest doubt that when
any politician says "Medicare for all" she hear's the classic "cha-chiiiiing" in her head. If she comes away from "health care reform" as being on her way to being a "self made billionaire who owes it all to the Democratic party" that is an albatross that none of us want to bear.