Every government program or mandate involves coercion, or the threat of it. Second, government is politics. And inevitably, there'll be a federal project for West Virginia to satisfy Senator Robert Byrd. Third, government's tendency is to grow. Virtually every problem that arises in society is an opportunity for politicians to posture as someone who can solve it.
Politicians pass laws to increase their power or reward their friends.
Bureaucrats seek to expand their jurisdiction. Businessmen want to use the force of government to gain advantage over their competitors. And, even when government programs and mandates are egregious, wasteful, and harmful, they are very rarely terminated. For example, despite their promises, Republicans have continued to increase the budgets of the Department of Education and the National Endowment of the Arts. Fourth, power will be misused eventually.