One of the most important contributors to the "Miracle on the Han River" was Park Chung-Hee. Under the rule of Park Chung-hee, South Korea began to make a successful recovery in its economy. Park Chung-hee announced the first 5-year Economic Development Plan to mobilize national resources in establishing a self-supporting industrial economy. This psychological boost gave Koreans confidence and motivation in its path to economic success. "Treat employees like family" was Park's new motto, which also led to Korea's economic success. With this motto, Korean workers were claimed to be 2.5 times more productive than American workers even though Korean workers were paid one-tenth of American wages.