(1) National health care will punish the insurance companies.
You want to punish insurance companies? Make them compete.
As Adam Smith observed, whenever two businessmen meet, "the conversation ends in a conspiracy against the public, or in some contrivance to raise prices." That's why we need a third, fourth and 45th competing insurance company that will undercut them by offering better service at a lower price.
Tiny little France and Germany have more competition among health insurers than the U.S. does right now. Amazingly, both of these socialist countries have less state regulation of health insurance than we do, and you can buy health insurance across regional lines -- unlike in the U.S., where a federal law allows states to ban interstate commerce in health insurance.
U.S. health insurance companies are often imperious, unresponsive consumer hellholes because they're a partial monopoly, protected from competition by government regulation. In some states, one big insurer will control 80 percent of the market. (Guess which party these big insurance companies favor? Big companies love big government.)
Liberals think they can improve the problem of a partial monopoly by turning it into a total monopoly. That's what single-payer health care is: "Single payer" means "single provider."
It's the famous liberal two-step: First screw something up, then claim that it's screwed up because there's not enough government oversight (it's the free market run wild!), and then step in and really screw it up in the name of "reform."
You could fix 90 percent of the problems with health insurance by ending the federal law allowing states to ban health insurance sales across state lines. But when John McCain called for ending the ban during the 2008 presidential campaign, he was attacked by Joe Biden -- another illustration of the ironclad Ann Coulter rule that the worst Republicans are still better than allegedly "conservative" Democrats.
(2) National health care will "increase competition and keep insurance companies honest" -- as President Barack Obama has said.
Government-provided health care isn't a competitor; it's a monopoly product paid for by the taxpayer. Consumers may be able to "choose" whether they take the service -- at least at first -- but every single one of us will be forced to buy it, under penalty of prison for tax evasion. It's like a new cable plan with a "yes" box, but no "no" box.