Which airport is a key component to 7th least corrupt economy in the world?
Aviation in Singapore: Aviation in Singapore is a key component of the Singaporean economy in its quest to be a transport hub of the Asian region. Economy of Singapore:  Singapore's economy has been ranked as the most open in the world, 7th least corrupt, most pro-business, with low tax rates (14.2% of Gross Domestic Product, GDP) and has the third highest per-capita GDP in the world in terms of Purchasing Power Parity (PPP).
Aviation in Singapore