Fairly meaningless rankings
Know many wealthy guys in US who are considering relocating to Geneva for tax reasons; has smooth roads and proximity to Germany for great driving, but crappy weather vs SF/LA
QOL in commie places like EU is arguably best for those who are lazy and want a well-paid government job from which one cannot be fired (or have a large inheritance)....sort of like the many $100K+/yr government employees in City of SF
If middle-income, would argue QOL is highest for guys who live and work in places like suburban Dallas or Chicago or Silicon Valley; these guys have co.-paid healthcare (and US has most of world's most talented and highly paid doctors); live in a newer house w/modern HVAC on plenty of land; drive a new Accord/Camry to office in a nearby suburb...and kids can pursue entry to world's leading colleges (and industries) which are all mysteriously based in CA or Northeast
US is land of upward mobility; most of today's wealthy (see Forbes 400 rankings and bios) in US grew up in middle-income households...Switzerland is a great tax haven and playground nr Paris, German autobahns and Monaco area for those who already have lots of bucks and are semi-retired/retired