People are susceptible to bribes, coercion, and blackmail and indeed the office of president of the US is one that ages a person quite rapidly.
The US Constitution is a document deeply mistrustful of government and meant to protect “We, the People” from it. People have a right to be wrong, say stupid things (especially in private), vote for idiots, and harm themselves.
I think the meta-significance of Brexit is clear- old people make poor choices based on old information of dubious veracity.
When the world doesn’t continue the amae of spoiling your kids, they face a future of becoming Patrick Bateman or 40yo video game playing virgin still living in his childhood bedroom.
Sanders/Trump – same coin; Clinton/Cruz- same bird