...Well, this guild is fucking retarded. This huge monster that had already defeated a large subjugation squad and was highly sought after for materials and them killing it not only got those materials but saved the lives of countless soldiers/guild-members and dragging it back into the city led to them giving a massive bill to the people that defeated it because... the smell inconvenienced the people in the city? And there was something about monsters being attracted to the blood, but for all we know it was just scavengers and carrion that go after corpses because they're not that powerful.
So what are you going to do if you're working and the guild has missions like this and wants to send you on them? After seeing this, I would tell the guild to go fuck themselves if they wanted to me to subdue such beasts/monsters. What, so I can fight and put my life on the line and possibly die or get horrifically injured just so you can take the dead body, make a profit off of it and then give me a bill?
It's not like he dropped the giant monster's body on a fucking house or something. There was no reason to be billed like that. Makes you wonder how they get anyone willing to work for them when they pull shit like that.