Government has become too damn big, too damn intrusive, and too damn lucrative for the good of the country. That’s why so much of the political class in this country is comprised of con men, sociopaths, and fortune hunters. Quite frankly, most of these people would rather that you didn’t understand their motives, what they really want to do, or the policies that they’re implementing because what’s actually good for the country is a much smaller consideration than what’s good for them personally.
Lord Acton said long ago that, “Power corrupts, and absolute power corrupts absolutely”. He was only partly right. The truth is that power tends to attract the easily corrupted; the con men, sociopaths, and fortune hunters that John Hawkins mentions. Although I am sure that there are a great many people in public office who sincerely want to help others, you have to consider that “normal” people really don’t want to tell everyone else how to live their lives. Normal people just want to be left alone. The sort of person who seeks office is either a normal person who wants to serve, or the sort of person who enjoys bossing people around. I leave it to you to decide which type is more prevalent.
Any system of government is going to tend to select the corruptible. Probably the only thing that can be done is to limit the power of government and use checks and balances to set the ambitious against one another, just as the framers of the constitution intended, and keep a close eye on them.