@Caleb James DeLisle The entire concept of democracy is based on the idea that you can't be made to follow a law that you never had a say in deciding. "No taxation without representation" and whatnot. If someone does not want to risk their lives in a war, and subsequently is deprived of suffrage, why should they then be made to obey all of society's laws and pay taxes?
Also, if we kill all the billionaires, we won't have to worry about getting into pointless wars. Just saying.