Only tangential to the subject, I know; but, when I was a young & naive booking clerk at Northampton (which had a separate wages office, so I only got involved with wage packets for staff that couldn't collect during the office hours that the wages clerks worked) I was puzzled because drivers would regularly turn up at the window asking for a cheque from the Railway Savings Bank ro be cashed. Puzzled, because, on enquiry, the Savings Bank did not pay interest (or, possibly, did but a tiny amount). I eventually asked my senior colleagues what was going on - why deposit money into the Savings Bank and then withdraw it the next week, repeating the process?
Clearly leading a sheltered life, I then received a lesson on the ways of the wicked world...
The deposit into the Savings Bank was a deduction indicated only by a code number. There was a number of deductions, tax, N.I., and for things like Union subs, British Rail Staff Association membership and so on, so the transfer to the Savings bank was one of many, and all those stoppages appeared as a sub-total between gross and net pay. Because of the size of the tax and N.I. totals a modest amount extracted into the Savings Bank would not stand out. But it did mean that the wage packet showed to the partner did not actually include all the money that had actually been paid after all the other, unavoidable, stoppages; the Savings Bank dosh could be spent 'privately'...