The aim of the AAA was to raise prices for commodities through artificial scarcity. The AAA used a system of "domestic allotments", setting total output of corn, cotton, dairy products, hogs, rice, tobacco, and wheat. The farmers themselves had a voice in the process of using government to benefit their incomes. The AAA paid land owners subsidies for leaving some of their land idle with funds provided by a new tax on food processing. The goal was to force up farm prices to the point of "parity", an index based on 1910–1914 prices. To meet 1933 goals, of growing cotton was plowed up, bountiful crops were left to rot, and six million piglets were killed and discarded. The idea was the less produced, the higher the wholesale price and the higher income to the farmer. Farm incomes increased significantly in the first three years of the New Deal, as prices for commodities rose. Food prices remained well below 1929 levels.