It is true that the U.S. spends nearly a third more on health care than the second-highest-spending developed country (Sweden), both in per capita dollars and as a percentage of GDP. But that reduction in spending can come with a price of its own: The most effective way to hold down health-care costs is to limit the availability of care. Some other developed countries ration care directly. Some spend less on facilities, technology, or physician incomes, leading to long waits for care. Such trade-offs are not inherently bad, and not all health care is of equal value, though that would seem to be a determination most appropriately made by patients rather than the government. But the fact remains that no health care system anywhere in the world provides everyone with unlimited care.
Americans cannot have unlimited care, from the doctor of their choice, with no wait, for free. The countries you talk about are paying more then 40% in federal taxes now!