How many of those people in socialized healthcare systems have you interacted with? I've talked with a number of Australians, in Australia, and they were all pretty satisfied with their healthcare. They also all paid less for it (via tax) than I pay for my healthcare here in the US, and they actually get something for it.
I pay out the ass for healthcare, even after my employer pays 2/3s of the cost, and it pays for jack shit. It's cheaper for me to tell the doctor that I don't have insurance and just pay the cash rate.
Healthcare for the common citizen is shit in the US, and anybody who thinks otherwise is either ignorant, or delusional. The vast majority of us would pay LESS under socialized medicine, but that wouldn't make the establishment rich.