It's one of the reasons I mentioned scrapping the minimum wage when implementing UBI.
The job market becomes much more of a market where work is paid for what it's worth because it's an actual market and employers don't have the undue leverage of simple survival over employees.
(Not that there isn't a good case for eliminating federal waste; but the reality I never hear uttered in the conservative bubble is that the largest government expense is federal employees and subcontractors.)
(Not that there isn't a good case for improving federal social programs; but the reality I never hear uttered in the progressive bubble is that the largest government expenses are social programs like social security, medicare, and medicaid.)
[1] http://eml.berkeley.edu/~dromer/papers/RomerandRomerAERJune2...
[2] http://www.newyorkfed.org/research/staff_reports/sr646.pdf
[3] http://time.com/9009/unemployment-is-worse-than-death/ (the point is made more thoroughly in the author's book)
You phase it in by starting it at a low level without replacing/reducing existing programs, and then as you ramp it up you start eliminating other programs.