Teams would be able to borrow goals from future games
Teams would be able to borrow goals from other teams
Referees would have a stake in the outcome of the game
Just think, eventually you could end up with teams starting games with negative scores. Teams would be borrowing against their expected future performance, when every member of the current team would be long retired. There would be hordes of sports analysts trying to predict the future by trying to analyze statistics of a chaotic system (OK, that's a lot like now).