The primary reason that -no- socialized program works is due to the absence of market feedback or market indicators. The application of a government-run system destroys the function of a marketplace, which are the only indicators for the government to "plan". In a government-run system, there exists no measurement for the application and distribution of funds. Even the most basic decision in health care is exponentially complex in a system void of "price". Individuals are no longer self-regulated by price/individual income; in their minds, it is now suddenly a "right" - demand will exceed supply.
A good example would be your car insurance/payment. You realize that you must pay X amount of dollars for the car itself, and X amount of dollars for insurance, and you realize that this car must last and maintain value for X number of years. Therefore, you drive carefully, wash, clean, and maintain the vehicle with routine oil changes and checkups. You know that if you abuse the car, it will cost you dearly. That is the essence of self-regulation via price. Imagine if this vehicle wasn't yours. Or, if it was paid for by a faceless entity. Imagine if you knew that no matter what you did, the maintenance and repairs were paid for by that same faceless entity. You would have no incentive to maintain a cost-saving or preventative mentality. While you may at first, the "natural law" of human beings soon takes over. :)
The same phenomenon occurs with health. When a faceless entity is paying for your health care, you have no INCENTIVE to eat properly, exercise, seek preventative care, limit your visits, etc.
This is basic economic law. There is no escaping this fundamental premise. No amount of money can solve the problem. More money, ironically exacerbates the problem. Health care, like anything else, is a scarce resource and the only thing that allows or creates the availability that we now have is through the self-regulation of price.
Lastly, the reasons why health care and insurance costs are so high are due solely to governmental regulation, influence, control, and the ideology that insurance should cover every conceivable doctor visit. Insurance is designed to insure catastrophic issues, not visits, shots, medicine, etc. The health care and health insurance industry is one of the most anti/non-competitive markets we have. Like our standard markets, it has experienced more and more regulation from the 1920s until now, but HMO legislation (thank you Democrat friends...) and FDA regulation was the largest body-blow in recent history to drive up costs and create more dependency on insurance.
People who cite that we spend the greatest amount of money on our health care misses the point. This is a great example of correlation vs. causation. Their argument is fundamentally flawed as it starts in the middle or the end of the problem, rather than attack the cause of the problem. We have the finest health care in the world - it actually increases in overall quality the older one becomes - the problem is the dependence upon insurance to cover the high cost of procedures which are directly related to market manipulation, regulation, and control via the federal government.
I can easily go on, but this is the general answer to your question. ;P
P.S. That 46 million figure includes:
10.1 million are individuals who have income of $66,000 for a family of four, but who elect to remain uninsured.
9.3 million are non-citizens who generally do not pay tax.
6.4 million who are enrolled in Medicaid or S-CHIP but reported to the Census taker that they were not. (This phenomenon is known among statisticians as the Medicaid undercount.)
4.3 million are eligible for Medicaid or S-CHIP but have not enrolled.
5 million are childless adults, mainly healthy, young adults who simply do not wish to pay for insurance (I am in this category).
Performing simple math this equates to: 10.9 million Americans without insurance. This is less than 4% of the population. Throwing out the economics, the Constitution, and ethics, do you honestly believe it is "fair" or even remotely makes sense to enslave 96% of the population to address 4% of the population?
The lie is that we do not want health care/insurance reform... WE DO! A government takeover is not reform. We want to repeal a host of laws, regulations, and controls so we can actually return to a functioning and competitive market that works for ALL other goods and services. Health care and health insurance is fundamentally no different than culinary cuisine, clothing, and home insurance.
Libertarian - 30+ years economics.
Note: The WHO has repeatedly tried to correct bad statistics involving infant mortality rates which greatly skew life expectancy. Other countries do not tally or record infant deaths as we do, many, unbelievably, do not at all. We record ALL births as births and ALL deaths as deaths, other countries do not. This, again, is the worst for of bad statistics.