In the early months of 1981, investors in a Swiss fund stuffed with cash, diamonds and gold began arriving at a five-star London hotel to await an audience with the fiscal wizard making them fabulously rich. Dr John Ackah Blay-Miezah would turn up in his grey chauffeur-driven Rolls-Royce, clad in an immaculately tailored suit and clasping a big cigar in bejewelled hands.