Politicians tell people what they want to hear.
It is impossible to deliver on these promises.
The people get frustrated, and turn to candidates like Trump and Sanders, who make even more outlandish promises.
This will lead to anger at them, should they ever win.
And the cycle will repeat..
The Fault, dear Brutus, is not in our stars but in ourselves.

http://www.cnn.com/videos/tv/2016/02/22/exp-gps-0221-take.cnn