As far as I am aware there is nothing like the NHS anywhere else in the world (though I could be wrong). We all pay National Insurance from our wages that pays for the NHS and the social security system, but even if you've never worked a day in your life you are entitled to free treatment. In Scotland we don't even have to pay for eye checks or prescriptions. Very few people choose to pay for private health care in the UK as we all tend to rely on the NHS
I am originally from Canada and I have heard that before.....it's not true. Every first world nation has a universal healthcare system paid by taxes,the only exception is the United States.
ETA this map, countries in blue have a health system in place for all residents https://www.gadling.com/2007/07/05/what-countries-have-universal-health-care/