Well we've certainly seen examples of this in Ted Kennedy, Boxer, Schumer, Thurman, Fenstein, Reid, Pelosi, Waters, Waxman, SJ Lee, Sanders, Kucinich, H.Clinton.....the list goes on.
Simplistic? Maybe. But in so many cases, voters cannot vote them out of office due to the deep entrenchment of the incumbent.
Government schools run by self-interested unions have dumbed the electorate down. Yet there has never been a time in the history of mankind that so much information has been available to voters, literally at the touch of a button. But people are mentally lazy and politicians use that fact to their own advantage. Huge numbers of Americans don't even bother to vote. And thus we get the government we deserve.