The Quakers founded Harvard university in 1636
The Founding Fathers created the U.S. government to have numerous checks and balances as well as a VERY limited central (federal) government. They did this to prevent a relapse of the tyranny (hence “absolute power”) they dealt with under the British Empire. The American colonies were essentially meant to serve the mother nation (Britain), but the colonists braved the journey to America to establish a new, freer nation with religious freedom as its top priority.
To prove this quote is still relevant today, it’s not unknown that when humans acquire power, it’s very easy for them to abuse that power. Examples of this would be the oligarchies we see in Russia and China with a very small amount of people in power living in a lap of luxury while everyone else lives a subpar life.
Media coverage gives voters an impression of the candidates.
Because much of media coverage comes in very brief news segments and even short "sound bites," it tends to provide an impression of the candidates, without necessarily providing in-depth presentation and analysis of their views. This varies, of course, depending on which "media" you have in mind with the question. Committed news organizations which employ highly skilled journalists will do deeper pieces on candidates and their views or policies -- see, for instance, articles in The New York Times or Washington Post or The Atlantic.
There are many new forms of media--such as social media websites and politically-aligned cable networks--where people can go to get biased perspectives and be told how to vote or not to vote. But the most respected media outets strive to present a full picture and cover all candidates. Still, because most voters will watch or read only portions of news media coverage, the best answer is that media tends to give voters an impression of candidates -- which sometimes is less complete than the full picture.
Free market or capitalism.