Oh I am so tired of this. You are so paranoid. Bottom line: If the elected leaders do things that the people dont like, then the people will vote to have them replaced. The government might have to go to the extreme before people wake up but rest assured that if enough people are disappointed enough in our government, then the people will vote to have the leaders replaced. It all comes down to that.
I'm not paranoid at all. I think we're a ways of from tyranny. What I think is that your argument is a little silly. That if a government did have tyranncal machinations that their gonna go 'oh wait, this piece of paper says we can't do that'.