In other words, we are born into debt and must work all our lives to pay off that debt. This is true in so many ways, and makes what we're talking about amount to at best a kind of bonded child labor.
You don't have to think of it as slavery, but it's very very far from COMPLETELY OPTIONAL. There is no deserted island to live on!! There are no guarantees of universal housing, or healthcare, or much else that is needed to survive. Until there are, working vs. not working can never be a real choice. The working class by definition must work in order to live.
It might take some work, but it seems possible to me.
A person either needs to use his parent's cash or to work for a number of years and save before leaving. The "choice" isn't available to him until that happens, so either his parents must work to purchase their child's freedom, or he must work to purchase it himself. In either case this is one of the very definitions of slavery.
There is no living outside of society, outside of private property and the rule of law. There is no real choice here.
This is sort of a proxy conversation about money. I'd like to point out that manufacturing your own money from scratch is a good way to get shot.
Having a job is the cost of living in society. It sucks and needs improvement, but it is not as bad as slavery where you have no choice and not much gain.