If someone is giving you money every month, for free, you are less at their mercy. Currently if people dont take whatever work is given to them, including being forced to go to work in a pandemic, they starve. If they have at least a basic set amount coming in every month they have the ability to actually pause and figure some things out. A married couple just through UBI may have enough to scrape by with no work. The work force suddenly has negotiating power because they don't have to take any job that comes along.

I could see society changing as well. If 20 people got together and formed a commune, that commune is essentially self maintaining as they get an income, can grow their own food etc.