The idea behind having a government plan is sound, if the government is not permitted to subsidize their plan with taxes. If the government plan was set up to run on its own and to compete directly with private insurers, then there should be no argument against it.
The biggest argument is that the government plan will be subsidized by taxes, making it impossible for private insurance companies to compete, and while I agree that we need some type of government plan to cover those who cannot currently get insurance, I understand why so many are against it. So keep it simple. Let the government plan compete directly with private plans but without any tax subsidies. Then if the government plan works better and is cheaper on its own, people will have a choice.
But here is the catch; all insurers would have to accept those with pre-existing conditions without charging higher premiums to those individuals. Since the goverenment plan would obviously take on those individuals, so too would the private insurers. Otherwise, the private insurers would continue to reject anyone with a pre-existing condition and all those people would be forced onto the government plan, making the goverenment plan much more expensive to operate.
If the government plan receives no subsidies, I have no particular objection to it, but I also don't see the point to it. If it is to compete for customers against private insurance companies, its costs will be similar and therefore its premiums will be similar. Although in absolute terms, health insurance companies' profits appear to be quite large, as a percentage of revenues, they are really quite low, so the elimination of profits will not make much difference it the government plan's costs. The most realistic hope is that by eliminating profits the government plan might for private plans to lower premiums by as much as 3%, but while welcome that would have little effect on the larger problems the health insurance overhaul is supposed to address. Additionally, if private insurance companies respond by greatly increasing advertising and other marketing costs, it could be that premiums will go up for both the government plan and for private plans.
While Obama continues to claim that a government plan is essential to combating the problems of our present health insurance system, the only reason he has been able to provide in support of this claim is that the government plan will keep private plans "honest". What does this mean? Is Obama saying private insurance companies are cheating their customers and the government plan won't? If this is so, why isn't Obama's Justice Department prosecuting the executives - apparently nearly all of them if this problem is so large as to require a government plan as the only possible solution - and suing the companies? The truth is that this is a slogan, not an explanation of his claim that a government plan is necessary to effectively address the larger problems with our health insurance coverage. It appears Obama's push for a public plan is motivated entirely by ideological and political considerations and has no basis in any real expectation this plan will bring any real benefits to the American people.