I was pointing at the two opposite ends of the spectrum. Modern democracies sit in the middle somewhere but lean to the left, so you get a mix of everything. It's quite obvious that there will be things that have to be forced on people, ie don't kill your neighbour, otherwise you are forced into jail. Something like medicare is a simple argument that the whole population must be in it or the system doesn't work. Should it have been farmed out as a separate 'tax', well that's political, as making you see how much it costs makes you feel like you don't need it and encourage moves towards privatisation and user pays systems. If the tax system also gave you a bill for our defense budget you would feel the same so they don't play with that so they can adjust it at will.
The other option to medicare is insurance based user pays, which in the US is pretty much un-affordable by the lower socioeconomic populations. So they just take their chances uninsured and usually with no way to afford the medical bills.