dlowan, Agreed,
There is indeed much that politicians take credit for, or have blame imposed for, that they have little to do with.
A facet of politics is that a person must convince an electorate (at least a fair percentage of) that his is the best remedy for social ills. After years of telling people this, and acting as if it were true, he begins to believe it himself.
This little phenomenon may well account for the excesses of many legitimate governments. The Versailles court in France, Henry VIII of Britain, House of Saud, and Franklin Delano Rooseveldt of the U.S. come rather quickly to mind.
A government rules only with the consent of the governed. I didn't notice that the consent had to be freely given.
The necessity of having sufficient power on the side of the government is what makes politicians necessary.
Stalinist Russia made do with only about six% firmly on the governments side.