Why does it continue? Because the power elite itself, a handful of dynastic families, apparently maintain their hold over the world via money printing. Without the ability to print money from nothing, the entire rotten enterprise of world government would collapse.
The justification for modern monopoly central banking is that it is "legal." But there is nothing legal in the generally accepted definition of the term about giving plutocrats the right to generate trillions, collectively anyway, while the elderly and the young languish with inflation that decimates their savings and interest rates that are too low to replenish them.