The official unemployment rate calculated by the Bureau of Labor Statistics excludes people who have not actively sought a job in the preceding four weeks, as they are no longer considered part of the civilian labor force." - from this article
How does that work? You still need money to survive but you’ve given up looking for work? You can’t be on welfare forever - how do those folks survive?
The independently wealthy, stay at home parents, the disabled, the kids who stay at home after school and are still supported by parents, people who make their money in illegal ways, the list goes on.