ГРЕТЬ/ПОГРЕТЬ (НАГРЕВАТЬ/НАГРЕТЬ) РУКИ (на чём, около чего) coll, disapprovVPsubj: human to make a profit for o.s. through some dishonest means
X нагрел руки (на Y-e) - X lined his pockets (purse) (from Y)
X feathered his nest.
«Заметов человек чудеснейший». - «И руки греет». - «Ну, и руки греет, и наплевать!» (Достоевский 3). "Zametov's a really excellent fellow." "And lines his pockets " "Well, so he lines his pockets, who cares9" (3a).