Government should found more art and research, also donation and crowd funding aren't passive income. I believe OP talked about the Marxists bourgeoisie the class of people who live off dividends or rent and doesn't need to work
Going by the traditional definition, UBI is indeed passive income. I don't think it is as bad as other forms of passive income, but I would prefer subsidies over just giving people cash.
There were musicians far before passive income for creative work was a thing. And it's not like the €0.003 per play Spotify pays is making bank for most musicians.