Why is the U.S. so bad at government?

Check out my latest at The Partial Observer. Excerpt:

The conclusion that must be reached is that in most if not all cases, private agreements are better than government policy because in the private sector the person who is being served, and the customer whose demands must be met, will more often than not be the one and same person. Even in other developed countries, where government seems to work better, they would still be better off with less of it.

But this doesn't answer our initial problem: why is American government worse?