As I understand this funds didn't lent Argentina anything, they bought the bonds in the open market at a huge discount.

I don't agree. As much I know, they lent Argentina no money. They bought bonds (I think that's the correct term) that already lost nearly all of their value since the land was already in trouble then, for pennies and now they want the full money back, that they never spent. As much I remember the profit would have been 16x the money spent. So, they lent no money to the country .... the papers already lost their value since the risk was high of total loss or a haircut.

I guess, even with the haircut settlement, even then they would have earning a lot of money -- but they where very greedy.

Our financial system should not foster poor greed!

The funds did not lend Argentina any money because they are not the original creditors. They picked debt at an extremely low value, and now want to collect extremely high interests.

Vulture funds give nothing to society. They are definitely not a force of good. The comparison to patent trolls is apt.