Because governments shouldn't be able to "borrow" trillions of dollars of fake money, distribute it to their friends, with the promise that future generations will give bankers a portion of their labor forever as "interest". That's slavery.

Bonus reason - All wars are banker wars. They cause wars so they can lend governments more fake money at interest, to enslave their people even more.

How do they get away with it? Because they also use this infinite fake money to fund blackmailed politicians who fuck kids and betray you.

It's a rigged system and the world needs out.