[manfredo]

Welfare comes with strings attached, or is spent on services (e.g. a soup kitchen). These are much less likely to be squandered, as the funds' applications are not determined by the recipients. UBI is not subject to such restrictions. There's nothing stopping people from wasting UBI. As the previous comment pointed out, people will waste their UBI so we'll end up paying for both UBI and traditional welfare. This is bad for UBI proponents, who usually depend on scrapping nearly all welfare spending too afford UBI.