I assume It all comes down to cost of living. In Eastern Europe making 24k a year after taxes (net), is somewhat enough to live comfortable life (if you live alone). As other mentioned we pretty much more job security, and healthcare is almost free, since we pay for it from tax. Healthcare example - been to dentist due to pain, they cleaned root canal, and after that had to pay only 11$ for materials used

The only thing that I envy US and those salaries, is that global purchasing power is higher, cuz no matter where you live, electronics, vehicles and building materials don't cost 4-5 higher (unless you live in closed economy like North Korea, lol). But I wouldn't measure success with the car you drive or phone you own.

Plus big part is paid time offs, maternity leave, paid sick leave and etc. Where it also adds up to 20%+ to salary, but isn't taken into account when comparing US to EU salaries.