You're about 1 or 2 steps away from reinventing double entry bookkeeping. Buy yeah in a proper accounting system you'd have those entries which would be easy to

You're about 1 or 2 steps away from reinventing double entry bookkeeping. Buy yeah in a proper accounting system you'd have those entries which would be easy to check, and nobody would be able to remove or edit them and the system would keep track of who was responsible for which entry. This system works well enough that it can be done with pen and paper. Perhaps consolidating some stuff from time to time (but keeping the calculations for X years). As far as I can tell Horizon wasn't playing by the rules, either because of bugs or because of badly designed secret admin access (maybe to fix those bugs, but you can guess how well that goes).