What does God owe Job anyway?

So, I was asked this question the other day:

"If God is so loving, then why did he pick on Job just to prove a point to the devil? How loving is that?"

That's obviously paraphrased. Won't say who asked, just in case they don't want to be named.

I don't know enough about Job to answer this question. So I'm expecting all you bible collage students to write me long essays about it. Actually, dot point answers would be fine.

The only responses I have to this question are:

- Well, all of the things that belonged to Job's were God's anyway to do with what he pleased. God doesn't technically owe anything to Job.

- And read the last chapter (Job 42) - God turns around and gives Job everything he once had back, and makes him twice as prosperous as he was before. Job is blessed with thousands of sheep, cattle, has so many kids and lives to see them out to the fourth generation. :) That short period of suffering compared to hundreds of years of enjoying God's blessings.... :)

- I like the last verse: "After this, Job lived a hundred and fourty years, he saw his children and their children to the fourth generation. And so he died, old and full of years." (Job 42:16-17)

- I don't really know what else.

So yeah. Have I missed anything? Is there anything else people want to add?