What do you wanna good proof of?
Life expectancy? What population health metrics do you want?
Almost all EU countries with socialized healthcare beat US and even UK. Canada is more near EU level.
Do you also want US anedoctal evidence?
What’s the consultation time for diagnose in the US for people without insurance/ insurance doesn’t cover/insurance says it doesn’t cover/no money??
Never?
How does that affect the average/mean?
Life Expectancy:
Italy 83.7;
Spain 83.7;
France 83.3;
Sweden 83.3;
Canada 82.6;
Portugal 82.4;
Germany 81.4;
United Kingdom 81.3;
United States 79.3;
Poland 78.6;
Yup, lots of cases where the owners stopped paying/turned-off water, gas, electricity and the court made them turned them back on (and pay all the bills).
Not in Germany, where you are responsible for the Wifi access, see hundreds of copyrights fines each year...
Anyway, it puts the persons living in that location on the radar of the police, and other evidence can be collected (For example by getting a warrant and taking all electronics out of the "location").