Roger's value just dropped a great deal at work. He lost Lucky Strike, his one major client.
Pete has been shoved into the background of season four a bit. But we see him more in the episode "Hands and Knees."

Mad Men Season 4 Episode 10 Quotes

Robert Pryce: Put your home in order, either here or there. You will not live in between.
Lane: Yes sir.

Greg dying is not a solution to this.