Grater than God

Here is a simple riddle.  Only 17% of Stanford University Seniors got the right answer
when asked.

What is greater than God,
More evil than the Devil,
The poor have it,
The rich need it,
If you eat it, you will die?

By the way, Jacob(age 7) got the correct answer. No pressure though!
Think about it

The answer to the riddle is "nothing"