I've read all the responses to this question, and I think it's interesting that people take this question in one of two ways.
1. The Court/Judicial system - and therein refering to Karma.
2. Their personal lives and what they've recieved.
I know what my father would have said, "If you never expect anything, you'll never be disappointed."
If you work hard, go to school, and do your best in all aspects of your life, you are usually rewarded with a well paying job and a fulfilling career.
So the moral of the story is, work hard, work hard, and marry your best friend. Everything will work itself out after that.
You're only going to get out of life what you put in.