Forbes reports that Iran's mullahs got rich at the nation's expense:

The 1979 revolution expropriated the assets of foreign investors and the nation's wealthiest families; oil had long been nationalized, but the mullahs seized virtually everything else of value—banks, hotels, car and chemical companies, makers of drugs and consumer goods. What distinguishes Iran is that many of these assets were given to Islamic charitable foundations, controlled by the clerics. According to businessmen and former foundation executives, the charities now serve as slush funds for the mullahs and their supporters....
The gossip on the street, going well beyond the observable facts, has the Rafsanjanis stashing billions of dollars in bank accounts in Switzerland and Luxembourg; controlling huge swaths of waterfront in Iran's free economic zones on the Persian Gulf; and owning whole vacation resorts on the idyllic beaches of Dubai, Goa and Thailand.