First, they don’t believe in “innocent until proven guilty” on your side of the border. That’s one of our quaint, antiquated American relics. In the more refined and upper class countries, people have the common decency to admit guilt when shamed into doing so by accusation.
But on a more serious note, due to driving being a privilege as opposed to a right, there is something we call “implied consent” as printed on the back of your license down here.