|Solidarity
In far off days before a good number of you were born, payroll for a large organisation (and this was a very large payroll, one of the biggest in SE England) was done by running a batch program which took some hours and generated a computer tape (yes, one of those big reels beloved of old school SF films). The tape was then couriered off to the bank, and the bank would process the tape which would make all the payments to the right accounts. Usually.
This was not to be a good day. There was a problem with the output, which was thought resolved by editing the tape. Tape went off to the bank. There was a further problem and more editing, but eventually the tape was run. And it made all the payments. Into a single building society account. This was spotted, and the building society stopped the money actually appearing in the lucky person's account. However they refused to actually return the money until all the i's and t's had been dotted and crossed, which I suppose is not unreasonable with the sums involved.
Trouble was everyone needed to be paid on time, so my late employer had to borrow the money for the entire payroll until they got the original money back. The interest payments on such a large sum were appreciable, and it was reckoned to have been the most expensive ICT cockup in the organisation's history. There was a big post mortem, but it allegedly failed to find out where the fault lay. I always believed that the technical staff on both sides very deliberately failed to find out where to pin the blame in case it was their side!