The Pay OffHow we pay is so fundamental that it underpins everything from trade to taxation, stocks and savings to salaries, pensions and pocket money. Rich or poor, criminal, communist or capitalist, we all rely on the same payments system, day in, day out. It sits between us and not just economic meltdown, but a total breakdown in law and order. Why then do we know so little about how that system really works? As you read this, technology is dismantling