It definitely is a problem of human nature to be sure. Absolute power corrupts absolutely. Most people just want to live their lives and don't seek power. The few that do seek power generally should never have it. But we do need some minimal power structures.
Part of the biggest issues is education. In western nations Political literacy and education is purposefully deficient. Because it benefits those in charge of the systems. Not to say it isn't similar in other style countries. Ignorance is always a useful tool however.