contraction. In 1931, the US federal fiscal revenue and expenditure changed from the financial surplus to a deficit for the first time (the deficit was less than 2.8% of GDP). By the end of 1931, Hoover had decided to recommend a large increase in taxes to balance the budget; in addition, Congress approved the tax increase in 1932, a substantial reduction in personal immunity to increase the number of taxpayers, and the interest rates had risen sharply, the lowest marginal rate rose from 25% on taxable income in excess of $100,000 to 63% on taxable income in excess of $1 million as the rates were made much more progressive. Hoover changed his approach to fighting the Depression. He justified his call for more federal assistance by noting that "We used such emergency powers to win the war; we can use them to fight the Depression, the misery, and suffering from which are equally great." This new approach embraced a number of initiatives. Unfortunately for the President, none proved especially effective. Just as important, with the presidential election approaching, the political heat generated by the Great Depression and the failure of Hoover's policies grew only more withering. In terms of the financial reform, since the recession, Hoover had been trying to repair the economy. He founded government agencies to encourage labor harmony and support local public works aid which promoted cooperation of government and business, stabilize prices, and strive to balance the budget. His work focused on indirect relief from state governments and the private sector, which was reflected in the letter emphasizing "more effective supporting for each national committee" and volunteer service -" appealing for funding" from outside the government. The commitment to maintain the gold standard system prevented the Federal Reserve expanded its money supply operations in 1930 and 1931, and it promoted Hoover's destructive balancing budgetary action to avoid the gold standard system overwhelming the dollar. As the Great Depression became worse, the call raised for increasing in federal intervention and spending. But Hoover refused to allow the federal government to force fixed prices, control the value of the business or manipulate the currency, in contrast, he started to control the dollar price. For official dollar prices, he expanded the credit base through free market operations in federal reserve system to ensure the domestic value of the dollar. He also tended to provide indirect aid to banks or