Wow. What an evidence-free hot take.
So, is _The Register_ "upper class", while sub-postmasters are "ordinary people"? Are Post Office managers "upper class"? I'm pretty sure it's not one of the main careers for old Etonians. Is Fujitsu "foreign", even though its business in the UK is mainly just the old, British, ICL.
Were any "cents" stolen? I suppose it's possible, since Post Offices do deal in foreign currency transactions.
It there's any actual substance, can you explain it with a few sources, please?