One legitimate criticism raised by opponents, however, is that universal healthcare, and especially the public option, will end up like welfare. Many welfare recipients either do not realise, or do not care, that they are essentially in debt to their fellow Americans who pay taxes, and so they think nothing of taking from the taxpayer dole year after year. It's the impersonality of government that does this - it's hard to feel that one owes anything. In contrast, if one's in a rough spot economically, and one goes to one's church (or other social organisation) for help, that person either knows the people who are donating money to help get him or her back on his or her feet, or one is aware that individual people are giving up some of their own money for his or her benefit.
That is bound to make one feel a bit more in debt, and a little shamed that one needed to go beg, essentially, for financial help. Before I rile people up with this last bit, I just think shame is a good emotion in this situation in that it is likely to motivate people to try harder to get a job so that: a) they no longer have to look to others for help, in this regard, and b) hopefully one day they will be in a situation where they are wealthy enough to be able to help out another monetarily.
While not directly related, 'free' healthcare helps to bolster this attitude that nobody's footing the bill for these services - which is not the case - and so it is acceptable for freeloaders to take advantage of this without ever contributing anything. If these 'freeloaders' could be educated, or shamed into realising that others are giving up things like a new car, for example, to help them, then maybe they'd start pulling more of their fair share.
Obviously, a child (or adult) with some rare, debilitating, and costly form of cancer is not going to be expected to pay back the cost of medical care. But in the majority of cases, people who already freeload in American E.R.s (the de facto existing public option) could be doing more to pay their costs.
So in that respect, I sympathise with opponents. If there's going to be a move toward (official) subsidised healthcare or even the public option, then there should be a corresponding cultural change among the many Americans* who are already in debt to their tax-paying peers who bail them out at their own expense.
On the flip side, in theory a public option where people are much more willing to seek preventative care, or go to the doctor as soon as they get sick, might end up being cheaper than the costs Americans pay through taxes already and through hiked-up hospital bills made so expensive to compensate for the free care freeloaders get in E.R.s.
* I'm not going to touch on the topic of whether or not illegal aliens/immigrants are currently putting an enormous strain on hospitals, or whether or not a free public option will lead to large numbers of Mexicans crossing over the border to get free access to developed-world healthcare in American cities near our southern neighbour.