Like the tale of the frog and the scorpion or the tale of the snake "I was a snake when you took me in" the political establishment cannot learn. They were stupid in the first place. All those fancy degrees were granted cum laude by professors who learned how to pick out the dumb ones who could be easily indoctrinated - a political class who don't need Ritalin because they have no gumption but to do what they are told.
It’s much simpler. They are corrupt. They continually sell the nation and the people’s interests to the highest bidder -domestic or foreign. And their betrayal includes espionage, as in the case of the Clintons and Hillary’s email server.