So if the electricity went off for good ?

[Scythe13]

Can I make one adjustment (more of an added paragraph) to NR's scenario?

All the banking records are held electronically. People no longer use their little bank books. It's all chip and pin now. Any money kept in the bank would be lost. The records of who owns what and who owes what would also disappear. Debts would be erased, but savings and retirement would too. The same goes for the stock-market, any stock-brokers, or anyone with a share focused pension plan......wiped from the face of the Earth.