Why? Because they're effectively above the law, that's why. They are the ruling class of a dictatorship, not a democracy. They own the courts and the media and the armed forces and the police and the CIA. The elections are merely a regularly scheduled gigantic PR exercise to keep the common people thinking it's a democracy. Didn't you know that? The government wins every election...and the government doesn't serve us! Oh, no. We serve it. If we refuse to serve it as it desires, WE are the ones who go up on criminal charges.

That's a dictatorship. (whether or not it holds phony "elections" that change nothing)