I wonder if anyone thought that it seemed a bit far fetched for 100 postmasters to all steal money. Then when it was 200, it must seem doubly far fetched. Once 500 postmasters were caught "stealing" money, wouldn't someone wonder how they managed to hire 500 dishonest people. Typically when you catch one person you always wonder how many got away with it, so they catch 500 then there must be 5000 or 50 000 postmasters that were stealing without getting caught. How many post offices are there really in the UK?