I don’t disagree about work as people who can will work on things they like or that they feel need to be done. Anecdotally I would say at least half the human “work” done is not for pay. The classic example is half the human population through out human history. Wives who “don’t work” have normally put in twelve hour days. Hence my point that “takers” are not going to work more than they need to survive although now they may work harder to remain a taker. The key to UBI, and, again, this is not an option but a necessity, is not eliminating work but breaking the link between working and “making a living”.
A more challenging problem will be finding interesting activities (work) for the less creative and the energetic youth who can be a constant problem when bored and unoccupied. Human societies have come to solve that with required training and public service usually as some kind of “military” or peace corps. A good portion of our “work force” is paid to do training as military or in government positions doing community service that they would do anyway. Also please remember that wage labor is barely 150 years old. The great battle of the early industrial revolution was figuring out how to get people to work more than they needed to live. And that was often done by giving them free booze while they worked.
So I would say it will be a fairly easy transition to a UBI society focused on creativity and service divorced from long hours of wage slavery for sustenance and a “living”. The hard part is removing the oligarchs and inheritors of vast wealth that are an inevitable product of extreme capitalist economies. I’m afraid now that the chaos of simultaneous economic and political failure will overwhelm us before we can get transitional systems in place.