Idioms: Exploiting/Taking Advantage of Others (negative connotation)

Question

Could you please give me an idiom, proverb, or saying that describes someone who exploits and take advantage of others?

An idiomatic expression that has a negative connotation.

Or maybe to say that one only pray when he/she needs God.

Or something similar to this (I quit praying when I got my prayers answered).

Thank you in advance.

Such a person uses others [as if they were merely tools, instruments with no rights and no feelings, merely to be left on the shelf when finished with]. — Edwin Ashworth, Oct 31 '20 at 14:16
One example of this is 'an employer who forces his employees to work long hours/overtime, but doesn't pay very much.' — Kermit, Oct 31 '20 at 15:56

score 0 · Answer 1 · answered Nov 01 '20 at 00:16

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User is what you’re looking for. Third definition. enter image description here

answered Nov 01 '20 at 00:16

Rivers McForge

1 Answers1