But don't the reserve assets just result in a bank using those assets as collateral for something else that can be used? I.e. you don't pay for a vacation with

But don't the reserve assets just result in a bank using those assets as collateral for something else that can be used? I.e. you don't pay for a vacation with reserve assets directly, but your bank uses them to pad it's fed account so that your vacation fees are accepted by other banks? Without the reserve assets, other banks wouldn't do business with your account, and you couldn't pay for that vacation.