Punished for enemy team surrendering?

So I just noticed this recently. You get more IP points the faster you win a game. Meaning if you win a game in 20 min you get more than if you were to win it in 30. BUT if the enemy team surrenders you get significantly less IP. I think like half as much or something. What is the deal with this? I've always had an issue with the surrender option mainly because of people surrendering when we still could've made a comeback but this takes it to a whole new level. The team surrendering is the one that should be punished, give them even less points then if they were to lose without surrendering (maybe already a thing, haven't checked). And the team that wins by the enemy team surrendering should get more points if anything. You were so good you scared the other team and made them surrender, what could be a larger sign of dominance?