The development and expansion consistent with the Seventh National Economic and Social Development Plan (1992-1996) and the Eighth National Economic and Social Development Plan (1997-2001), Thailand’s sound economic position is internationally recognized. In addition, sustained public investment in economic and social infrastructure has made a significant contribution to an overall rise in incomes, living conditions and quality of life [6]. However, in the first year of the Eighth plan, Thailand experienced a severe economic crisis with great impact on individuals and society, including problems of increased employment and poverty. Restoring economic stability and reducing the impact of the crisis thus became a priority. The Ninth Plan (2002-2006) adopted the Sufficiency Economy Philosophy to guide the development and administration of the country, at the same time as continuing the holistic approach to people-centered development from the Eighth Plan. The plan prioritized solutions to problems arising from the economic crisis in order to build an economy with strong internal foundations and resilience to external changes, while aiming for balanced development with respect to people, society, economy, and environment in order to achieve sustainable development and the well-being of the Thai people. The performance under the Ninth Plan can be summarized as adequately successful. The national economy grew steadily. The stability of the economy improved. Poverty fell, while the quality of life of people improved greatly as a result of expansion of health services, better health insurance in both quality and quantity covering a majority of the population, and a decline in drug problems. But the Thai economy remains vulnerable to external instabilities, while problems persist over poverty, income distribution, and quality of education, security of life and property, and transparency in government administration.