Mount Everest and Ethics

This apparently must be the climbing season for Mt. Everest. My understanding is that it is rather short, because once the monsoons come in, you cannot climb anymore.
In any case, climbers have been leaving their fellow climbers to die as they ascend to the top.
This article from the New Zealand talks about one climber who was passed by forty people on their way to the top (and I presume, also, on their way back from the top).
On the other hand, this article from the CBC describes a climber who aborted his ascent to help them.
I understand from reading Jon Krakauer's Into Thin Air (an excellent book by the way) that the less time you spend at the higher altitudes, the better off you are, but this definitely raises moral questions. I think they probably ought to have stopped and helped this man.