The last 100 years have been a steady progression in the expansion of executive power. In terms of the history of this country, the idea that the president is expected to wield as much power as he does is relatively new. It was never intended to be this way, but as the progression has been gradual, we've been acclimated to it. When things are going wrong, the public wants one person to have the power to 'fix it,' and someone to blame when it's not. Basically, we want to elect our king and expect him not to be corruptible by the power he wields, but when in the history of the world has this ever been the case?