Before 1989 budget deficits are small in Taiwan. The debts/GNP ratio is as small as 5.81% in 1988 since the government sector implemented austere fiscal policies in the past decades. But, budget deficits have soared after 1989 due to the procurement of public use land during 1989-1994, the Wagner's law of government size, and adverse public choice factors. Public debts are piled up from NT$152.6 billions in 1988 to NT$2458.0 billions in 1999. These voluminous government debts incur crowding out effect so that the Taiwan economy slumped in the past years. Fiscal reforms are taken to stop the accumulation of debt. These are total sum budget system on zero-base idea, the abolishment of provincial level of government to improve economic efficiency of the economy, and tax reforms. Fiscal reform as a social economic engineering plays an important role to economic development in Taiwan. That is why citizens' popular support to fiscal reform is decisive to the Taiwan economy.