Like cages full of birds, their houses are full of deceit; they have become rich and powerful
OJBAs a cage is full of oph, so are their batim (houses) full of mirmah; therefore they are become powerful and oshir (rich, wealthy).
T4TLike a hunter has a cage full of birds that he has captured, their homes are full of things that they have gotten by deceiving others. So now they are very rich and powerful.