I see Sepp is saying we need this now after the Ukraine match. For me this is just a stupid argument as I think controversy makes life interesting in sport. However IF it does go ahead, the cost per football ground is in the region of £250k to £300k for Hawkeye for incidents that happen at best a handfull of times a season This money will have to be clawed back by the clubs somehow so fans will get shafted again I personally see no justification for that much money to decide if a ball went over the line or not. The notion that goal line technology will help with penalty decisions etc is not what the argument is and it wont help with that and other assumptions people have made. Its simply for the ball crossing the line thoughts?
Why not have a "video referee" from whom the on-field referee can request a decision when he is not certain? Works well in rugby.
Because it stops the game for too long ... reviewing the video footage takes forever, and then you just have people saying "well why didn't the referee look at the video for that, or that, or that?". And before long you get a game like American Football where they're stopping the action every 10 seconds for something. Hawkeye works nearly instantly.
Maybe someone could go around checking the eye-sights and bank accounts of the referees... Seems a better option to me. I mean come on, they are all close to retirement age, and I wouldn't exactly let my gran lecture me that a ball had or hadn't crossed the line, and the DVLA won't even let her drive.