There's A Mole

The take from the three robberies was substantial, each hit greater than the last as they panicked further and tried to move more money. Substantial, but hot as hell.

So it was buried, deep in the forest, in a leather  case with four locks on it, one per member. As they died, the keys would accumulate, and eventually the lucky last survivor would get the cash, they all decided.

Wheels, Buckshot, and Grifter all died at Blueprint's hand within a fortnight, and he left it five whole years.

Plenty of time for the moles to chew through leather, and bills.