Yeah, well, politicians have been adept at getting people to vote against their own self-interests for years. Ryan is just one in a long line of those politicians. At some point, doesn't the responsibility for the perpetuation of that dynamic lay at the feet of the voter rather than the politician?
Most of those voters won't even take a cursory look at the facts and figures telling them they've been conned or duped by their candidate these days. Shit, most voters won't even take responsibility for their own lives to begin with - anything bad that happens can't possibly be the result of poor decisions they themselves have made - so it's not a shock that they won't admit they made a mistake voting for a candidate.