Oh they absolutely work Ralphy!!!
No system that I've seen is perfect, but the checks and balances built into our system of Government have served us well. Of course, I'm always open to new ideas. What would you propose to replace it?
Some commentators and pundits have said the on going Health Care debate is about as ugly as politics can get, for instance. Thats one way to look at it. I see it as checks and balances working it's way through our system. Kind of like the flu works it's way through your system, "stuff" happens along the way.