Ok, so let's go with your assessment, that life-long slackers are indeed quite few. What happens when being a life-long slacker becomes acceptable in the culture (or as it might start out, in some subculture)? If slacking makes its way into culture, and becomes more accessible, isn't that potentially quite a big threat to the prosperity of future generations?
Legal and funded does not mean acceptable in the culture. It's legal to go about naked in many places, but it's not often done, because it's not acceptable in the culture.
Welfare already exists and while the lazy scrounger stereotype definitely exists, I feel it's worth that overhead to take care of vulnerable people and those in hard times.
Why would it be a threat? We've multiplied individual worker productivity by fantastical amounts. I think it's vastly more likely that we will have more people who want to work than meaningful jobs in which to employ them.
