Although just about every other country in the developed world manages to provide universal coverage for its citizens, at a comparable or higher standard than most insured people get in the U.S., and at a fraction of the cost? Do you really think that the American government is so very much more incompetent than those of other countries? (If so, maybe you should go live in Cuba - where, incidentally, they have excellent universal health care, comparable in quality to that available in the U.S., and costing a tiny fraction of the amount: wicki.)
To respond to the OP, however, there is a huge downside to effective healthcare reform, not for the American people or economy (for whom it is almost entirely upside), but for insurance companies and other institutions that make enormous profits out of the current system. All the so-called waste is actually going into someone’s pockets, after all. In the case of the health insurance companies, in particular, we are looking at large, powerful and very wealthy institutions that are literally fighting for their lives. Of course they are going all of the vast resources at their disposal, including (but by no means limited to) spreading lies and confusion, to stop it happening.
(And, of course, they have many politicians - apparently all congressional Republicans and quite a few Democrats - and much of the media, in their pockets.)
Conservatives tend to be more susceptible to being being taken in by the bullshit being spread around because a lot of it appeals to their general ideological viewpoint, but note that the vast majority of conservatives in countries that do have UHC fully support it, and recognize that it is good for business, the overall economy, and the public purse (except the private health insurance business, of course). Single payer UHC is actually entirely consistent with good, prudent fiscal conservatism. I do not think Republicans, for the most part, oppose UHC because they are Republicans (or conservatives), but either because they are corrupt, or, as I said, for ideological reasons more easily bamboozled on this issue than progressives are, or perhaps because they see the political danger of the Democrats being able to take credit for achieving it.