Como dizer "Bem de vida" em inglês

Well-off

Na primeira definição corresponde ao nosso 'bem de vida', enquanto na segunda se refere a estar numa situação muito boa, privilegiada.

well off adj.
1 (comparative better off) having a lot of money (Rich): a well-off family. They are much better off than us.
2 (comparative better off, superlative best off) in a good situation: I’ve got my own room so I’m well off. Some people don’t know when they’re well off. badly off

Aqui vão outros exemplos:

well-off usage examples
Used with adjective complement
Become: When more than 1.25 billion people become well-off, the demand on everything will be enormous.
Modifies a noun
Background: Most of the schools surveyed were in areas where children came from well-off family backgrounds.
Modifying another word
Relatively: Many relatively well-off families might think they aren't entitled to credits on top of child benefit.
Preposition: in
Society: Public funding is intended to help the least well-off in society with the costs of their legal advice.

Exemplos soltos traduzidos!

And, in an aspirational society, if the well-off can see their feet, everyone else will want as well.
E numa sociedade que valoriza a ascensão sócio-econômica, se os bem de vida podem ver os "pés" deles, todo mundo vai querer também.

Educated, informed and well-off, but too apathetic to vote in India
Educados (no sentido da educação formal, esolca etc), bem informados e bem de vida mas sem entusiasmo (apáticos) para votar na Índia.