Usury
Usury occurs when the profit made on a product or service is excessive, exorbitant and unauthorized. The usurious profit is no longer proportional to the added value provided, the selling price not to the costs incurred.
Usury occurs mainly in industries where the market has little influence on price and where the way prices are arrived at is opaque. Many real-life examples of observed usury have come from the financial and healthcare sectors.