Years ago, somebody discovered a sleeping monster living in The Abyss (I referenced the title!) This monster woke up and briefly glanced at the pathetic person. This guy was well built but when compared to this monster, he may as well of been weak. The said person's name was EpicArtifex.
He had came not to slay it but to ask for a favour. He wanted $5 to buy a sandwich as his other sandwich had spontaneously combusted. The monster agreed on this loan and charged interest at a rate of 1000% per anum. However, EpicArtifex never repaid the loan...
10 years later
The monster finished messing around on his computer when he realised Epic had never repaid the $5. He crunched some numbers and realised he owed about $129,687,123,000. It rounded the total up so it would get more money. $130,000,000,000 was now owed.
The monster sent a letter to the residence of EpicArtifex asking for the sum of money. He suggested small installments of $130,000,000 every year which if met would stop the money accumulating. Epic owned a highly successful multinational and decided that even his own business couldn't pay off the debt. The Monster had no choice but to create a damage bill high enough to pay off the debt.
Nobody failed to see the monster destroying stuff. Not even corrupt police. Nobody could legally take action. Except for one person, BanMan. Oh wait, we can't afford him so we could alternatively use BatMan. But I'd get sued for using him... All superheroes were unavailable so the government had to think. Then it hit them. Banks. After recovering from such a brutal injury they went to the bank.
The Bank said that they do this sort of thing all the time. Therefore, the bank could stop the monster.
The monster realised he had no money and turned around to see a banker. The said banker offered $5 with 1000% interest per anum. The monster agreed to this before realising what had happened. The bank had put the monster in debt to cancel out the debt already owed by Epic.