The Kennedy and Bush clans wield some power, true.
But nothing compared to those who control the media. (Look at the generations of families that run Hollywood.) They control the narrative, which controls the masses, which choose to empower the Bush/Kennedy/Clinton alternatives.
Bushes : Bay of Pigs, prime suspects in Kennedy's assassination (means and motive), transforming Irak from the most prosperous third-world country into a hellhole, turning a blind eye to what was brewing just before 9/11 because their best pals Ben Ladens were involved... are you sure about your statement ?