yes the problem with the 4 year wait is that players usually have a very hectic schedule what with their local leagues, then international club tournaments, then the Olympics, then the America's Cup over here, and the European Cup over there, and finally the qualifying round for the WC. To make a WC every 2 years would be almost impossible. Let's not forget that as important as the World Cup is to most people, what runs the football industry are the major leagues around the world, and national compe ions usually come in second.