The problem with this suggestion is that it doesn't respect the philosophy behind the current score system. Currently, scores are still somewhat indicative of ability, in the sense that if two players only play a certain type of game against each other, their points will reach a natural balance which reflects their ability. The same is true on a larger scale. The fact that most players vary the type of games they play makes the scoreboard less reliable, and abuse does take place, but the principle is still there. The fact that a players score won't grow higher at a certain point is part of that.
By giving players the option to play for a set amount of points, this natural balancing factor will disappear. You give up whatever indication of strength is there to change the system into a flat out race. Definately not a fan.
Een van de Veroveraars der Lage Landen