Median wealth per adult has the USA at #28, below Italy, Spain, Slovenia, and Portugal.
USA 25th percentile 28k to 30k EU-27 50th percentile 24k to 26k.
No, sorry, it isn't. People commonly use the phrase "has money" to refer to income in American English.
A bigger salary is no good if you have nothing left after paying housing, groceries, bills, education, healthcare...
Again, the deal with the US is that the rich live better and the poor live worse. Or put another way; people who make money get to keep more, and people who don't make money are given less.
Because there are so many more people who have money, and because those people like living comfortably, available healthcare and education is world class. Make sure not to read that as "All healthcare and education", it's "available healthcare and education".
Generally people who are earning a lot don't care as much about vacation, but every white collar job will generally give at least a standard 15 days off and 10 holidays. Ironically as you move up you are generally given more vacation while actually using less.
Even poor populations worldwide have access to the 3 things you described, but the quality is lower.
European decline has been mentioned since the 1930s.
Americans don't have vacation in the same way Scandinavian countries don't have a minimum wage. Even the most left-leaning States in the US have not written it into law because it is effectively addressed by custom. Americans are sufficiently happy with it that vacation isn't a political topic.