UBI without some sort of partner program to de-commodity the things humans need to live (food, shelter, healthcare) and eventually things we need to live a decent life (education, recreation) would likely lead to a situation like in The Expanse where the “basic income” is truly basic, just enough to live off ramen noodle and rent a crap studio. What jobs there were would be hotly competed over since everyone wants more to life than microwaved noodles and playing the first Halo on a 20 year old Xbox.