“But who will clean toilets if everyone gets UBI?
Maybe… the people who want to do it, at a fair wage? Maybe... the task will get automated?
Maybe the real question is: why do we accept that some jobs should be so miserable and underpaid that people only do them out of desperation?
#UBI forces us to value labor instead of exploiting it and it gives us the freedom to choose the jobs we take. 
@ubi4me Japan manages to keep them clean through a combination of communal responsibility for communal spaces and a variation of karma.
CEOs will clean public toilets without saying a thing about it because of the belief it will pay itself back somehow.
It shouldn't sound quite so alien if we actually practiced what we preach here. "It takes a village," "they have their reward," etc.