And then used it to make money by leading it out.
Those that deposited it - had 'Free' service.
They did not of course get service free- the cost came out of the profit made on their deposit.
In the last 50 years or so the trend has been to move from cash to 'cashless'
Wages into bank and not in little brown packets.
The bank customers instead of being net depositors have in the main become net withrawers and with drawers have to pay for the privilege.
Especially those that withdraw without asking first.