The US needs better politicians, but that would mean giving better education to the voters, which would cost money, and the US taxpayers don't like that idea.
The prospect that the US work force would be more productive if its workers were better educated should make the idea attractive, but US employers prefer to ship the jobs overseas to cheaper worker who have been educated at somebody else's expense.
The US does seem to be doomed. Going democratic before the idea had been properly worked out, and letting the people who own the country keep on running the country hasn't worked out well. Mexico and Canada will eventually have to take over the smoking ruins of a noble - but premature - experiment.