Yet the state pension tells us that isn’t the case. The state pension is a UBI allocated by age rather than physical area. We have millions of data points showing that when people receive sufficient to live on they stop working.
The result is political pressure to remove the state pension or increase the age at which it is received.
If UBI worked as you suggest then the resulting increase in productivity would drive the state pension age down not up.
The evidence is against you. Giving people money reduces productivity and makes it more difficult for firms to get the labour they require, and at huge cost to the state that uses up the finite taxation space there is available.