You are correct. I don't have data to answer all your questions, though I do deal with children and the elderly here: http://news.ycombinator.com/item?id=2130441
Feel free to assume the one set of numbers I am unable to find in 5 minutes of google completely debunks me. After all, all the facts we do not know must support our preconceived notions, right?
And that doesn't even touch on the people who cannot get a job for any number of reasons.
Again: please read the first paragraph. It explains that "working poor" includes the unemployed (people looking for work, but who have not found it).
That is a huge assumption.
Please learn the difference between "definition" and "assumption". I don't know how you define "hardworking", so I chose a definition, explained what I meant, and presented facts concerning that definition.