We have a massive bureaucracy to handle all the various aspects of the distribution of those benefits. Most of which is not necessary in a basic income system.
The cost savings by eliminating that bureaucracy would be substantial.
Buying them new equipment as the old stuff breaks or becomes obsolete.
And it may not show up directly on a balance sheet, but: how many bureaucrats love their job? How much depression and misery do you remove by replacing "go sit in a dimly lit crowded office all day for enough money to pay for your basic needs" with "hey here is enough money to pay your basic needs, go do whatever"?