he was avaricious and unscrupulous. 

 2)Covetous – having strong desire for the things that other have

 he is covetous of your rank and position.

 3)Mercenary – interested only in making money

 His motives are entirely mercenary.

 4)Penurious – Poor or not willing to spend money

 A penurious old tramp.

 5)Venal – motivated by susceptibility to bribery,corrupt

 local customs officer are notoriously venal.

 6)Acquisitive – interested in acquiring money or material things

 we live in competitive and acquisitive society.