Contrary to popular republican belief, NOT the road to Socialism. Rather the gates that prevent banks from using your money to make bad investments until "It's gone." Also the reason a loaf of bread does not cost 5 million dollars.
South Park explains the consequences of lacking regulation.
"Great, I will deposit the money in your account. Then I will invest the money in unstable foreign currency in order to turn a profit, and it's gone. This table is for account holders only. NEXT!"