It's cheaper to give the poor unconditional basic income than to have a huge bureaucratic administration that makes sure that they pass certain conditions to be eligible for welfare payments.

I decided to see what I could find on how much the administrative costs are, and I found this: http://mediamatters.org/research/2005/09/21/limbaugh-dramatically-overstated-administrative/133859

The most useful part seems to be this line:

Finally, the report estimated that the federal administrative costs amounted to $12,452,000,000 for the 11 programs studied -- 6.4 percent of total federal expenditures on these programs.

That doesn't sound like much of an issue.