Lose more LP in 4v5 than 5v5?

I mean, I know Riot still hasn't done anything about afks in ranked yet, but why do we lose MORE LP when we have an afk than when we don't? That's the biggest bullshit I've ever seen that when you have no chance of winning you get punished for it, but when you throw a game it becomes just a minor setback on climbing. At least make us lose equal LP when we lose a 4v5 with the afk instead of making us lose MORE LP than in a 5v5.