First off, I could go cash only, as I said before- I know plenty of people that do so, in everything from primary care to psych to pain. They provide less expensive care to their clients while also making more money simply by cutting the overhead that is inherent in collecting insurance (billing/coding/compliance/EMR). You also sell short that I do intend to help people- 10% of my panel will be charity care, because that's the right thing to do, and all care I provide in retirement will be free of charge (assuming, of course, I ever get to retire should we end up with a nightmarish government system similar to the VA).
And the people who want universal health care do not want physicians to be more in-control. They want evidence based medicine, which, as anyone here who's actually practiced can tell you, is far less "evidence based" than one would be led to believe, and far more about controlling the autonomy of providers and reigning them in. They want a quantifiable, fixed system that operates on protocols and cheap drugs, rather than the best personalized care with the best interventions possible. Look at the NHS to see what they want- people being denied cancer care because it's too expensive, transplants being denied based on completely arbitrary parameters for "the greater good," life-saving medications being unavailable- you think that wouldn't happen here? This isn't just about money, this is very much about maintaining the physician-patient relationship, physician autonomy, and patient choice. Money is in the mix, certainly, but it is far from the only (or even the biggest) issue.
As to this being about control, a lot of us were drawn to medicine because it afforded us a greater deal of control over our careers than we would otherwise be afforded (while sacrificing control in some other aspects). Physicians have historically been very independent. We weren't employees, we weren't cogs in a machine, we were small business owners, our own bosses, and free to operate our practices and conduct our treatments as we saw fit. We're not some sheep that are looking for direction, we got in this to lead others and to be in control of our own careers and futures. If I wanted to be a part of some overly burdensome corporate or government hierarchy, I'd have been a police officer or a middle manager. You're telling me, "you should just fold over and be a part of the system." I'm saying, **** that, I'm going to fight to make things better, in whatever way I can.
And I'm hardly a neocon loooool, the members of the SPF would probably spit their coffee straight into their keyboards if they'd seen you lob that one at me. I'm a fiscally conservative, socially liberal type, typical amongst physicians and medical students.