@Riot, why is no "cancel the game" mechanic implemented to handle dcs?

As title states, a person made this topic a while back and it got very positive feedback from the player base.

Mathematically the team that has the most gold normally wins games, so what will happen when one team has a dc? Mathematically unless the enemy team with 5 does the most major screw up, the team with four will always lose.

To those who go

"Ive won four v fives"

You only won it for the enemy team allowed you to win, mathematically you should not of won it at all or had a chance.

In a legit four v five where the enemy team knows simply off pure basic addition that they are stronger, they will turn the game into a bully charge as a five man group and take all the towers, as the team with four is near helpless.

What should be implemented?

If a person dcs within the first twenty minutes of the game and has not reconnected within 4 minutes the game should be automatically canceled no lp or ip given to either party.

To those who say this is a abuseable season

Riot is a smart group of people, they should be able to figure something out

This is not a salt post, this is a issue that has existed for over 4 years that has yet to be given a solution.