When governments print money (create new money) to pay out a Universal Basic Income to everyone it causes what's called "Currency Debasement" and effectively steals purchasing power from all the pre-existing holders of that currency via inflation of that currency. In the SBI scenario it takes the future purchasing power of genuine content creators from the reward pool.

Alternatively governments could fund UBI via increased taxation which is a more direct theft of purchasing power - generally from productive members of society.

In more insane scenarios the workers are paying taxes just so the government can give it right back to them in the form of a UBI. It is typical government inserting itself where it doesn't need to be, nor belong.