Provide source. And data collection method. In American statistical reporting, there are various official methods. Ones that are based on tax documents, necessarily do not include people who are below reporting thresholds. In real terms, not only are there a lot of unemployed that cannot find jobs, a lot of people with jobs are just one or two pay checks away from the street. Official stats are a joke.
Well, I wouldn't say, of course, it's totally impossible to find incomes less than $30 an hour among the Americans, but I think it's quite rare. You're talking about terrible things, could you at least specify the kind of job those people have? Where the salaries are so incredibly small that people can't even pay for their bills...