WHY IS GOVERNMENT SO DIFFICULT?

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Is it because of corruption?
Is it because of the demands of the citizens?
Here are few quotes:
Let us never forget that government is ourselves and not an alien power over us. The ultimate rulers of our democracy are not a Preseident and senators and congressmen and government officials, but the voters of this country. -Franklin D. Roosevelt
Nationalism is an infantile disease. It is the measles of mankind. -Albert Einstein
The constitution is an instrument, above all, for limiting the function of government...Throughout history, government has proved to be the chief instrument for thwarting mans liberty. Government represents power in the hands of some men to control and regulate the lives of other men. -Barry Goldwater