http://www.democraticunderground.com/discuss/duboard.php?az=show_mesg&forum=389&topic_id=7389618&mesg_id=7389618Elected Democrats at the Federal level are members of the national elite. If they weren't a member when they were elected, they are quickly brought into the fold. They are surrounded by lobbyists, other members and staffers who were lobbyists, as a rule. They learn they need to raise immense amounts of money in the off years when normal people aren't giving, and that the only way to raise that money is for corporate interests and rich people to write the checks. They also receive the benefits of elite status, very quickly. It's not an accident that the every Senator except Bernie Sanders is wealthy.
Whatever Americans think, whether they support a public option or single payer; whether they're for or against Iraq or Afghanistan; whether they agree with bailing out banks or not, elite consensus is much much narrower than American public opinion. It starts at the center right and heads over to reactionary (repeal the entire progressive movement and the New Deal, taking America back to the 1890s).
The elites are convinced they know what has to be done. Not necessarily what's "best", but what is possible given the constraints they believe America operates under and the pressures which elected officials work with. So Obama can say, and mean, that if he were creating a medical system from scratch, he'd go with single payer. But he "knows" that's impossible, not just for political reasons, but because there are huge monied interests who would be horribly damaged or even destroyed by moving to single payer. On top of that, he looks at the amount of actual change required to shift all that money away from insurance companies and to reduce pharma profits, and to change which providers get paid what, and he sees it as immensely disruptive to the economy
http://www.openleft.com/diary/16774/why-democrats-are-trying-to-commit-electoral-suicide