"wonder why jurors only get 17 bucks a day in a country like the U.S. with its 'best justice system in the world' and how much jurors are paid in Canada?"
Ummm....it's called civic duty which, in your mind apparently is not a consideration unless you get paid to do so. Perhaps you should question  why you think payment and "best justice system in the world" is relevant? Good luck connecting those dots.