Do not trust in oppression
And do not vainly hope in robbery;
If riches increase, do not set your heart upon them.
This verse is directed more to those who might go all out to get the things that they think they need. They eventually resort to sinful methods of gain: oppression and robbery.
Even if this works, even if they get away with it for a season, they shouldn't (and won't) trust in it. It is a fleeting gain.