Is there an honest belief that wealthy people keep their money sitting idle in bank accounts? That would explain a lot of the hyperbolic language around the pol

Is there an honest belief that wealthy people keep their money sitting idle in bank accounts? That would explain a lot of the hyperbolic language around the politics of envy - it's a pretty easy (although nonsensical in reality) leap to assume the wealthy accumulate money just to keep it out of the hands of "the people."