en_tn/psa/062/009.md

men of low standing ... men of high standing ...

This refers to men of all levels of wealth. The phrases "are vanity" and "are a lie" have the same meaning. AT: "men that are poor are vanity, and men that are rich are a lie" or "all men, both low and high, are a lie" (See: rc://en/ta/man/translate/figs-merism and rc://en/ta/man/translate/figs-parallelism)

... are vanity ... are a lie ...

This means that you can not rely on them or put your trust in them. AT: "... are unreliable ... are untrustworthy" (See: rc://en/ta/man/translate/figs-metaphor)

oppression or robbery

These two words have basically the same meaning. (See: rc://en/ta/man/translate/figs-doublet)

for they will ... on them

The words "they" and "them" refer to "riches".