Similar to why you might prefer a 10 line program that is O(n) to a 4000 line program which is O(nlogn) -- seems obvious to me.

There could certainly be exceptions for some programs (like Food stamps for children who don't yet qualify for UBI) or for things that are not bought with cash in a marketplace (if we ever had state health providers, for example), but for the most part, this comparison could eliminate dozens of government agencies and programs while expanding benefits.