I would say, you are "poor" if you think you are poor.... (even when you seem to be rich).
I would say you are "affluent" if you think you are affluent... (even when you make an average wage)
I would say you are "rich" if you think you are rich... (even when you only have a part time job, but are happy with your life)
I know people of all three backgrounds, and... some of them are deluded, but most seem to be able to place themselves in their "proper" category from where I see it...