Maintain the robots or harvest the onions. Unless there are earners there will be no welfare so it's really not optional.
Let's not forget we wound up doing something with all that agricultural labor John Deer obsoleted.
You make new tech and move into it leaving the old tech to whoever cannot.
That's what made America great.
Just need to stick to the formula and let's ideas drive, not government playing favorites.
If the earners are the robots, the robots won't spend any of it. If one person can maintain 100 robots that do the work of 100 workers, where will the remaining 99 work?
The government may have to step in and become the employer of last resort for those 99. They can start doing the jobs that need doing, but don't provide a profit, jobs like maintaining infrastructure, clearing brush on public lands, cleaning up public places, there is lot to do. Bring back the WPA and put Americans to work. Finance it by the productivity of the automated workplaces.