The UBI future may be universal government employment but that government will be a data-driven government that replaces modern bureaucratic governments. Alternatively, the bureaucracies will be opened up to employ most of the population in the task of managing the data-driven government. Everyone will have an income because everyone will be employed as data workers in a dedomenocracy.
I think this daily expense account is more realistic than a basic income to provide for the basic welfare of the unemployed in a fully automated economy. It is also helpful to illustrate how dismal this state of affairs will be. The expense account is a daily ration, and a cot in a shelter. But the shelter will have plenty of available virtual-reality head consoles.