The phrase "from the least to the greatest" shows that all the people of Israel are included in the phrase "all of them," regardless of how important they are. Alternate translation: "all of them, including the least powerful, the most powerful, and every one else, are greedy" (See: [[rc://en/ta/man/translate/figs-merism]])
This refers to the least powerful and least important people. Alternate translation: "the least powerful people" (See: [[rc://en/ta/man/translate/figs-nominaladj]])
This refers to the most powerful and most important people. Alternate translation: "the greatest people" or "the most powerful people" (See: [[rc://en/ta/man/translate/figs-nominaladj]])
The abstract noun "gain" can be expressed with the phrases "get more money" or "get more things." Alternate translation: "want to get more money by lying to people" or "strongly desire to get more things and will even trick people in order to get them" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])