For those who attribute basically good and selfless motives to government, consider this logic:
This sort of argumentation reflects a general double standard of morality that is always applied to State rulers but not to anyone else. No one, for example, is surprised or horrified to learn that businessmen are seeking higher profits. No one is horrified if workers leave lower-paying for higher-paying jobs. All this is considered proper and normal behavior. But if anyone should dare assert that politicians and bureaucrats are motivated by the desire to maximize their incomes, the hue and cry of “conspiracy theorist” or “economic determinist” spreads throughout the land.
From Rothbard, For a New Liberty