The Eighth Five-Year Plan (1966–1970) is considered to be one of the most successful periods for the Soviet economy and the most successful when it comes to consumer production (see The "Kosygin" reform). It became known as the "golden era". The 23rd Party Congress and the Ninth Five-Year Plan (1971–1975) had been postponed by Brezhnev due to a power struggle within the Soviet leadership. At the 23rd Party Congress Kosygin promised that the Ninth Five-Year Plan would increase the supply of food, clothing and other household appliances up to 50 percent. The plan envisaged a massive increase in the Soviet standard of living, with Kosygin proclaiming a growth of 40 percent for the population's cash income in his speech to the congress.