[zlast]

Good observation in the comments:

  You were rich because you discovered that you could eat little but peanut butter sandwiches and eggs and still be content. Others, despite having the discipline to spend less than they have, find they can't be content living under the privations that doing so entails. They do not feel free and cannot be considered rich.

You can be content on surprisingly little. It pays to find out what that "little" is.