Fatal assumption #34,218.
Assuming that they ever had the skills to begin with!
Working even menial jobs develop skills and those skills and abilities build on previous skills. It is called promotion. Plus a person develops a work ethic and most important self respect.
And another benefit: if the job is unpleasant or undesirable, that can be motivation to do better such as learn a trade or get an education.
All of this is lost if a person gets stuck in the welfare system.