I'm talking in general. It's happening in the first place because the SL are fundamentally flawed. A world where your life force is a fuel and its existence is dependant on some external powers instead of being a fixed realm existing indepedently is not a comforting thought. Not to mention the attacks by other cosmic forces which were happening before Jailer started making his moves.. For a place of eternal rest it sure is anything but.
And if you want to be nitpicky, current SL aren't in their "natural" state. We know they were different before Jailer was banished.