If the rich tend to have their money invested, or in a bank account that invests it, shouldn’t someone’s accumulated wealth not really matter to the rest of us?

That is, unless someone had all their money in a big, physical, scrooge mcduck money pit, so that it was physically removed from the economy, doesn't that money keep getting invested and respent? Isn't it still accessible?

Like it gets invested in a business, who uses it to pay a contractor, who uses it to pay their employee, right? So why does it matter if they have the stock?

Or is it because of what would happen if they all divested all their stock at once that we all have to care?